277results about How to "Voltage balance" patented technology

An Organic Light Emitting Display (OLED) that is capable of decreasing the number of output lines for a data driver using a demultiplexer, displaying an image with uniform brightness, and adjusting white balance includes: a plurality of red, green and blue sub-pixels, and each sub-pixel is provided with an auxiliary capacitor to compensate a decreased driving voltage. The respective auxiliary capacitors are different in capacitance according to emission efficiency of the red, green and blue sub-pixels. The auxiliary capacitor of the green sub-pixel has a larger capacitance than the auxiliary capacitor of the red sub-pixel, and the auxiliary capacitor of the red sub-pixel has a larger capacitance than the auxiliary capacitor of the blue sub-pixel. This enables the white balance to be adjusted with the same data voltage.

The invention relates to a TFT-LCD pixel structure, a manufacturing method and a broken wire repairing method. The TFT-LCD pixel structure comprises a plurality of pixel cells limited by a grid wire and a data wire, wherein a thin-film transistor and a pixel electrode are formed in each pixel cell, a first public electrode wire is formed on the lower side of the grid wire, a second public electrode wire is formed on the upper side of the grid wire, a first light blocking strip is formed on the left side of the pixel cell, and a second light blocking strip is formed on the right side of the pixel cell; the first public electrode wire, the second public electrode wire, the first light blocking strip and the second light blocking strip form an integrated structure and form an annular structure on the periphery of the pixel cell; and the second public electrode wire positioned on the upper side of the grid wire is connected with the first public electrode positioned on the lower side of the grid wire through a connecting electrode. The TFT-LCD pixel structure can be repaired quickly and efficiently, and has high success rate.

The invention relates to an energy transfer type power battery quick balancing system and a control method thereof. The invention relates to the battery voltage balancing system and further relates to the control method of battery pack quick balancing process, which solves the problem that a balanced battery single body and an energy storing element are impacted through pulse current by a currentbalancer in the prior art. The system comprises a power battery pack single body battery voltage and flying capacitor voltage detecting network, a current sensor and a signal modulating circuit, a single chip microcomputer, an electric power transfer channel, a first filter circuit, a two-way buck-boost converter, a second filter circuit and a flying capacitor. After starting to work, the system firstly detects the battery pack single body battery voltage, the flying capacitor voltage and the charging/discharging current; and if the dropout voltage between the highest voltage of the battery single body and the lowest voltage of the single body exceeds a set value, the balancing operation is started.

A basic unit of lithium-ion battery, including: at least two series-connected lithium-ion cells; at least one lithium-ion cell for balance; controllable switches with the same number as the lithium-ion cells; a drive module for the controllable switches; a voltage detection module for detecting a voltage at two ends of the lithium-ion cells; and a controller. The lithium-ion cell for balance is connected in parallel to the lithium-ion cells. The controllable switches control the turn on/off of the connection in parallel between the lithium-ion cell for balance and each of the lithium-ion cells independently. The drive module for the controllable switches and the voltage detection module are connected to the controller. A battery pack including the basic unit of lithium-ion battery and a method for real-time charge/discharge equalizing of the basic unit of lithium-ion battery are also provided.

The present invention provides a luminescent apparatus having a bright, high-quality image. A reflecting surface-including electrode, and an EL element formed of an organic EL layer and a transparent electrode are provided on an insulator. As shown in FIG. 1, an auxiliary electrode 107 formed of a transparent conductive film is connected to the transparent electrode via a conductor. This structure enables a resistance value of the transparent electrode 104 to be substantially lowered, and a uniform, voltage to be applied to the organic EL layer.

Provided are a glass substrate bonding method capable of securely anodically bonding a bonding material and a glass substrate even when Si having a large resistance value is used as a material for the bonding material, a glass assembly obtained by the glass substrate bonding method, a package manufacturing method, a package, a piezoelectric vibrator, and an oscillator, an electronic device, and a radio-controlled timepiece having the piezoelectric vibrator. A glass substrate bonding method includes an anodic bonding step of anodically bonding a bonding material fixed to an inner surface of a lid substrate wafer to a base substrate wafer. The bonding material is formed of an ITO film and a Si film which are sequentially formed on the inner surface of the lid substrate wafer.

An electromagnetic pickup for a musical instrument, has two coils (2, 3) with pole pieces (4-8, 9-13) in their core regions and a connection that connects the two coils together, out of phase, in series or in parallel, so that they cancel each others extraneous noise and hum. To accomplish a noise-free pickup with the clarity and dynamics of a single coil pickup, and a uniform output level throughout its longitudinal axis, the coils are partly overlapping each other, the pole pieces in the core region of the first coil are partly overlapping with the pole pieces in the core region of the second coil, and the coils (2, 3) with the pole pieces (6-8, 1-13) induce the same voltage in the overlapping area (14) as the voltage induced by the coils and the pole pieces in their core regions outside the overlapping area (14).

The invention provides a balanced charging device, which comprises a controller, a plurality of charge-discharge subcircuits and a voltage converting device, wherein the controller is used for acquiring an actual voltage value of each single battery in a battery pack, comparing the actual voltage value with a given voltage range to determine an unbalanced single battery, sequentially controlling the switching on and off of each charge-discharge subcircuit connected with the unbalanced single battery and controlling the voltage converting device to charge or discharge the unbalanced single battery to balance the unbalanced single battery. A balanced charging method comprises the following steps: performing voltage sampling on each single battery in a series battery pack to obtain the actual voltage value of each single battery; comparing the actual voltage value with the given voltage range to determine the unbalanced single battery; and sequentially charging or discharging the unbalanced single battery to balance the unbalanced single battery. The balanced charging device and the balanced charging method provided by the invention solve the problem of unbalanced charging of the series battery pack and effectively improve the service performance of the battery pack.

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 relates to an H-bridge cascade type active power filter. In the invention, an A phase valve circuit LINKA, a B phase valve circuit LINKB, a C phase valve circuit LINKC and a passive filtering inductor branch are connected in a star shape or a triangular shape and then are merged in a power grid. The valve circuit of each phase comprises a common alternating-current bus, a single-phase transformer bank, a direct-current isolation capacitor, an inductor series circuit group, a single-phase H-bridge auxiliary transformer bank, a direct-current voltage support unit direct-current capacitor group and a single-phase H-bridge main convertor group; the single-phase transformer bank comprises m single-phase transformers, and primary windings are connected in parallel through the common alternating-current bus; n secondary windings of the m single-phase transformers are connected with n single-phase H-bridge auxiliary converters through an inductor and the direct-current isolation capacitor group; the n single-phase H-bridge auxiliary converters are respectively connected with n single-phase H-bridge main transformer direct-current voltage support capacitors; and n single-phase H-bridge main converters are connected with the power grid in parallel through the passive filtering inductor branch after being cascaded.

The invention discloses a lithium battery charging control method, device and system and a battery management system. The lithium battery charging control method comprises the following steps of detecting parameters of a lithium battery; calculating charging currents of the lithium battery; controlling a battery charger to charge the lithium battery according to the charging currents. The lithium battery charging control method solves the problem that, in the prior art, the service life of the lithium battery is shortened due to the fact that the lithium battery is easy to be over charged and achieves the effect that the service life of the lithium battery is improved.

The invention provides an equalizing charging device, comprising a controller and a plurality of charging branch circuits, wherein, each charging branch circuit is used for respectively charging each single cell in a series battery; the controller is used for collecting the actual voltage magnitude of each single cell, the actual voltage value is compared with a given voltage magnitude to confirm imbalanced single cells, closure and disconnection of the charging branch circuit of each imbalanced single cell are controlled in sequence. An equalizing charging method comprises the following steps: carrying out voltage samplings of each single cell in the series battery to obtain the actual voltage magnitude of each single cell; comparing the actual voltage magnitude with the given voltage magnitude to confirm the imbalanced single cells; charging the imbalanced single cells in sequence and then stopping charging the imbalanced single cells. The equalizing charging device and the method provided in the invention solves the problem of imbalanced charging of the series battery, thus effectively improving the service performance of the battery.

The invention relates to a direct current (DC) side capacitor voltage balancing control circuit for an H-bridge cascaded active power filter, which comprises a single-phase transformer bank (2), wherein the single-phase transformer bank comprises m single-phase transformers, and primary windings are connected in parallel through a public alternating current (AC) bus (1); n secondary windings of the M single phase transformers are connected with n single-phase half-bridge converters through an inductor and a DC isolation capacitor; the n single phase half-bridge converters are respectively connected with DC voltage supporting capacitor of cascaded power units of an H-bridge cascaded multi-level converter, wherein m and n are natural numbers no less than 2, and m is no more than n. The balancing control circuit can balance DC capacitor voltages in same cascaded power units of the cascaded multi-level converter and DC capacitor voltages of different cascaded power units.

The invention relates to a method for controlling a three-phase photovoltaic grid-connected inverter when a power grid voltage is unbalanced. The method comprises the steps of establishing a three-phase photovoltaic grid-connected system main circuit and an inverter control system, collecting signals, carrying out clark transform, synchronizing power grids, extracting the phase sequence, calculating a reference current, controlling a current loop, carrying out inverse clark transform, controlling PWM and driving an inverter. The method has the advantages that a photovoltaic power source is efficiently connected to the power grids under the situation that the power grids are normal; the grid-connected current harmonics are effectively eliminated through an LCL filter, and high-power factor grid connection is achieved through a PR current controller; when the power grids break down, the faults can be omitted, and three control targets of voltage supporting, voltage balancing and power vibration eliminating are achieved.

The invention discloses a method and device for automatically equalizing voltages of power battery groups. Each single battery of the serially connected power battery groups is connected with an electronic switch, the serially connected power battery groups are connected with a charge-discharge circuit through the electronic switches, and the voltages of the serially connected power battery groups are compared by detecting voltages at two ends of each single battery in real time; a first electronic switch connected with the first single battery is switched on when the voltage of the first single battery is larger than that of a second single battery, and the first electronic switch of the first single battery is switched off after the first single battery charges the charge-discharge circuit; and a second electronic switch connected with the second single battery is switched on, and the charge-discharge circuit charges the second single battery, thus the voltages of the first single battery and the second single battery are equalized, and all the processes are sequentially repeated till the voltages of all the single batteries of the serially connected power battery groups are equalized. According to the method and device for automatically equalizing the voltages of the power batter groups, disclosed by the invention, direct equalization between the high-voltage single batteries and the low-voltage single batteries is realized in the serially connected power battery groups in short time.

The invention discloses a mine power battery, which comprises a charging main circuit, a detection circuit, a phase shifting pulse controller and a main control unit, wherein the detection circuit, the phase shifting pulse controller and the main control unit are respectively connected with the charging main circuit, the main control unit is based on a single chip microcomputer, the charging main circuit consists of a rectification circuit and a high-frequency direct current conversion circuit, and the main control unit detects a work state of a charger through the detection circuit, gives out charging control signals through the phase shifting pulse controller, completes the detection and the control on the output current and the voltage and realizes the control on the storage battery charging process. The mine power battery has the advantages that the safe and intelligent charging on a mine high-capacity lithium ion battery can be completed, the step for replacing the traditional mine lead-acid storage battery with the mine lithium ion battery can be promoted, the size is small, the weight is light, and the miniaturization and the light weight of the charger can be realized; under the condition of the same power, the size can be reduced to 1/3 of the original value, and the weight can be reduced to 1/4 of the original value.

The invention provides an automatic balance device of a distribution network with three-phase load balance, which relates to a device able to automatically regulate the distribution network with three-phase load balance, aiming to solving problems that in the prior art, an adjustment method of the distribution network three-phases load balance is only able to cause the distribution network nearly to the three-phase balance with the disadvantages of waste of time and vigor, requirement of a shutdown and delay manufacture. In the invention, a voltage detection module, an electric current detection module, a voltage across-zero-aberration detection module and a solider relay and power-supply module are connected with the three-phase distribution network; the voltage detection module and the electric current detection module are connected with an electric energy computation module; the electric energy computation module is connected with an interface electric level switching module; the interface electric level switching module is connected with a master controller; the voltage across-zero-aberration detection module is connected with a slave controller; the control input terminal of the slave controller is connected with a control output terminal of the master controller; the solider relay is connected with a first rectifier; the solider relay is connected with the slave controller; the first rectifier is connected with a first inverter; the first inverter is connected with a parallel-in module, and the parallel-in module is connected with the three-phase distribution network.

A lithium battery voltage equalization circuit topology belongs to the voltage equalization circuit topology. The lithium battery is connected in parallel with two pairs of anti-series MOSFET tubes, and the switching status of the anti-series MOSFET tubes of the upper and lower bridge arms is controlled to realize the connection or bypass of the lithium battery or lithium battery pack to the main circuit. In the process of charging and discharging, according to the terminal voltage of the lithium battery or the terminal voltage of the lithium battery group, the two pairs of MOSFET switch tubes of the upper and lower bridge arms are controlled to be turned on or off, thereby changing the flow path of the charging and discharging current, and finally maintaining the terminal voltage of each lithium battery. The purpose of equalization, and greatly increase the available capacity of the battery pack, reduce the impact of conventional equalization schemes on the life of lithium batteries. When a certain section or a group of lithium batteries is detected to be faulty, the state of the control switch tube will bypass the faulty battery or battery pack, forcing the faulty battery to be separated from the main circuit, while other lithium batteries can still continue to work normally. It provides reliable protection for the safe work and personal safety of the package.

Provided is an apparatus and method for equalizing voltage of accumulator units connected in series. The voltage equalizing apparatus includes a DC/AC converter (31), a current-limiting inductance (33); and N voltage-equalizing branch paths (32), wherein N is natural number. The current-limiting inductance of the equalizing apparatus can be distributed into each voltage equalizing branch path and be replaced by an equivalent leakage inductance, or by means of connecting a separate inductance on the prime side of the transformer. The voltage equalizing apparatus absorbs energy from the accumulator and transfers to the accumulator unit with lower voltage in the accumulator, thus the balance of the voltage of each accumulator unit. The invention is characterized in that the circuit structure and the control method is simple, the switch tube may realize soft switching, the converter volume is small, and autonomous democratic voltage equalizing of the accumulator is implemented.

The invention provides a vehicle battery protection device which comprises a charging protection unit connected with batteries. During the charging process of the batteries, if the voltage of the batteries is greater than or equal to the preset voltage threshold, the electric quantity of the batteries is consumed so as to reduce the voltage of the batteries, and the batteries are prevented from overcharging. The invention also provides a vehicle. Through the technical scheme of the invention, the voltage of a plurality of batteries in a battery pack is equalized, and the batteries can not be damaged due to overcharging. Meanwhile, the under-voltage protection of the battery pack can be realized, and the vehicle can be conveniently restarted after under-voltage.

The invention discloses a charge-discharge equalization control circuit of a battery pack. The charge-discharge equalization control circuit comprises a charge-discharge circuit, a voltage detection circuit, a voltage comparator, a controller, a current-sharing circuit and a discharge switch. An input end of the charge-discharge circuit is connected with a power line, and an output end of the charge-discharge circuit is connected with at least two battery single bodies respectively. An input end of the voltage detection circuit is connected with at least two battery single bodies respectively. An input end of the voltage comparator is connected with an output end of the voltage detection circuit. An input end of the controller is connected with the voltage comparator, and an output end of the controller is connected with the charge-discharge circuit. The current-sharing circuit is connected with the charge-discharge circuit and the controller. The discharge switch is located in the charge-discharge circuit. The charge-discharge equalization control circuit can ensure charging equalization between the battery single bodies through a replacing mode and a current-sharing mode in the charging process, can control the high-voltage battery single bodies to charge the low-voltage battery single bodies, and further ensures the mutual equalization between the battery single bodies in the discharging process.