88results about How to "Fast equalization" patented technology

Providing a charge condition adjusting apparatus, which can shorten a time for equalization of each charge in unit cells, a low-voltage CPU selects each smallest unit cell in the each cell block, which has each smallest voltage between the both electrodes, from among plural unit cells structuring the cell blocks. The low-voltage CPU controls ON/OFF of a block-discharging switch to connect the both electrodes of each cell block and each block-discharging resistor for discharging the each cell block until the each voltage between the both electrodes of the selected smallest unit cell reaches the target voltage. Successively, the low-voltage CPU controls ON/OFF of a selecting switches and a cell-discharging switch to connect the both electrodes of each unit cell and each cell-discharging resistor to discharge the each unit cell until the each voltage between the both electrodes of the unit cells reaches the target voltage.

A battery module equalization apparatus according to the present disclosure includes a plurality of slave controllers each electrically connected to the plurality of battery modules to measure voltage values of the plurality of battery modules, and having a slave charging/discharging channel through which the current that charges and discharges each battery module flows, and a master controller that receives the voltage value of each battery module from the plurality of slave controllers, selects at least one of the plurality of slave controllers based on the received voltage value, and transmits a CHARGE or DISCHARGE command to the at least one selected slave controller, and having a master charging/discharging channel through which the charging current supplied to the at least one slave controller and the discharging current supplied from the at least one slave controller flow.

A device for the measurement of external pressure in a wristop instrument, such as a sports computer, a diving computer, a wristwatch, or the like, which includes an instrument body,—at least one watertight space disposed inside the instrument body, and at least one circuit board situated and a pressure sensor disposed in the watertight space. A flow path extends through the instrument body to the watertight space and this flow path is closed by a membrane, which is permeable by a gas, but not by water, and which closes the flow path in a watertight manner.

The invention discloses a bus-based battery pack equalizer circuit. The bus-based battery pack equalizer circuit comprises N batteries; each battery is connected with a corresponding equalizer circuit and the equalizer circuit is connected to a controller; each battery is connected with one equalizer circuit and each equalizer circuit is connected to one controller; the batteries correspond to the equalizer circuits one to one and the equalizer circuits correspond to the controllers one to one; the controllers are used for controlling the equalizer circuits according to the energy information of the battery pack, and thus realizing two-way flow of energy between the battery module and an energy transmission bus and realizing equalized energy storage of the batteries; the N controllers are connected in parallel to a data bus and the N batteries are connected in parallel to an energy transfer bus; N is greater than or equal to 2.

The invention discloses an improved SVM equalization method and system for an NG-PON. The method in the invention comprises the steps of: (1), inserting training sequences into digital signals needingto be transmitted every the set length, generating electrical NRZ signals through high-rate NRZ modulation, and converting the high-rate electrical NRZ signals including the training sequences into optical NRZ signals; (2), transmitting the optical NRZ signals to a receiving end, and converting the received optical NRZ signals into the electrical NRZ signals; (3), performing up-sampling on the electrical NRZ signals, and performing down-sampling after time synchronization; (4), extracting the training sequences, constructing a characteristic value vector for each training sequence, and calculating an optimal hyperplane; (5), judging information sequences by utilizing the optimal hyperplane, so that equalization is realized; and (6), returning to the step (4) after equalization of the information sequences is completed every the set length. According to the improved SVM equalization method and system for the NG-PON disclosed by the invention, the problem that the receiving sensitivityof the system is decreased due to signal distortion, intersymbol interference and the like introduced by bandwidth limitation when high-rate signals are transmitted by a low-bandwidth device can be solved.

The invention discloses a multi-winding-transformer-based automatic battery equalization circuit and an implementation method thereof. The automatic battery equalization circuit comprises a pluralityof battery groups, a micro controller, and multi-winding transformers. Each battery group consists of a plurality of single battery bodies and is provided with one multi-winding transformer; secondarywindings of all multi-winding transformers are connected in parallel and are connected with the corresponding battery groups by diodes; and positive and negative electrodes of the single battery bodies are connected with the corresponding transformer windings by switching tubes. The micro controller controls turning on or off of all switching tubes simultaneously. Automatic and simultaneous equalization from any single battery body to any single battery body among the multiple battery groups is realized by one path of PWM control signals.

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.

An actuating solenoid and a non-stick disk by means of which adhesion of an armature of an actuating solenoid to a pole core can be prevented. The non-stick disk is provided with at least one oil channel through which oil can be fed into the contact area between the non-stick disk and the armature or the pole core.

The invention provides a voltage dynamic balance management system of a power lithium battery pack, which relates to a charging and discharging balancing circuit of a series power battery pack. The voltage dynamic balance management system comprises a microprocessor, Hall sensor modules, channel selecting modules, a switch driving circuit module and a DC/DC (Direct Current/Direct Current) transformer, wherein the microprocessor is used for gating a single battery in the battery pack by a first channel selecting module; an input end of the DC/DC transformer is connected with two ends of the battery pack; an output end of the DC/DC transformer is connected with two ends of the single battery by the switch driving circuit module and the switch driving circuit module; an input end of a first Hall sensor module is connected with a charging current input end and a discharging current output end of a charging and discharging switch; an output end of the first Hall sensor module is connected with the microprocessor; an input end of a second Hall sensor module is connected with a balancing charging current output end of the switch driving circuit module; an output end of the second Hall sensor module is connected with an input port of the microprocessor; an input end of the switch driving circuit module is connected with an output end of a second channel selecting module; and an output end of the circuit driving circuit module is connected with two ends of the single battery of the battery pack.

The invention relates to an energy storage battery pack equalization system which comprises a battery pack. The whole battery pack is divided into a plurality of groups and is equipped with a batterymanagement unit (BMU), an in-group converter, an inter-group converter and a switch group to accelerate equalization speed and prevent the excessive system complexity. An equalization scheme proposed by the invention can realize the internal power balance of a local battery group in the whole battery pack and realize the inter-group equalization of different local battery groups, the energy lossis small, the equalization speed is fast, the efficiency is high, the structure is simple, the cost is low, and the equalization scheme is suitable for a large-capacity battery energy storage system.

The invention relates to a method of producing a plurality of portions of a precooked food wherein the food is initially cooked at temperatures above 80° C. and prepared, the food is then cooled in a cooling phase within a maximum time of 120 min passing through the temperature range of 55° C. to 8° C. to a final temperature in the range of 8° C. to 0° C., and stored for a few days at the final temperature. The food is poured into an agitator vessel (22) during the cooling phase wherein the food is simultaneously thoroughly mixed and cooled during the cooling phase by an agitator (01, 26) constructed as a heat exchanger according to the invention.

The invention discloses a control method for a modular echelon utilization energy storage battery. An echelon utilization energy storage battery system is provided, wherein the echelon utilization energy storage battery system comprises a charging main circuit, an echelon utilization load circuit, an echelon utilization contact switch and multiple single lithium batteries; the multiple single lithium batteries are arranged between the positive electrode and the negative electrode of the charging main circuit in series; the echelon utilization contact switch is used for regulating the quantity of the single lithium batteries which are connected with the echelon utilization load circuit in parallel; any two adjacent single lithium batteries form a balance basic unit; each balance basic unit is provided with a shuttle balance capacitor; a bidirectional change-over switch is arranged at each of the positive electrode end and the negative electrode end of each shuttle balance capacitor separately; and two bidirectional change-over switches are alternately connected with the positive electrode and the negative electrode of the single lithium batteries in the balance basic units. By adoption of the control method provided by the invention, the electric energy echelon utilization of the power battery pack and the capacity balance of all the single lithium batteries can be realized.

The invention discloses a battery pack equalizing circuit and method. The circuit comprises a battery pack, a voltage collecting module used for collecting the voltage of single batteries in the battery pack, a switch switching module, a control module and at least one bidirectional DC-DC module, and the bidirectional DC-DC module is connected with the battery pack. The control module is used for judging whether the single batteries need to be equalized or not according to the collected voltage of the single batteries; when the judgment result is that the single batteries need to be equalized, the switch switching module is controlled to enable the single batteries needing to be equalized to be connected with the bidirectional DC-DC module, and then the bidirectional DC-DC module is controlled to enable energy to flow among the battery pack and the single batteries needing to be equalized. The battery pack equalizing circuit and method have the advantages that the radiating aim is achieved, the equalizing current is large, the equalizing speed is high, and the energy utilization rate is high. The battery pack equalizing circuit and method can be widely applied to the field of battery management.

The invention relates to a battery module balance control device and method. The device comprises: a battery module, a data acquisition module, a SOC estimation module, a fuzzy controller and an equalization circuit module, wherein the battery module is connected with the data acquisition module, the data acquisition module is connected with the SOC estimation module and the fuzzy controller, theSOC estimation module is connected with the fuzzy controller, the fuzzy controller is connected with the equalization circuit module, and the equalization circuit module is connected to the battery module. According to the method and the device, the battery real state judgment accuracy can be improved, the equalization current can be increased, the equalization time can be shortened, the control cost is low, equalization can be realized under the condition that the hardware structure of the current battery management system is not changed, the fault tolerance is high, and the occurrence of anover-equalization problem can be effectively prevented.

The invention discloses a voltage-sharing circuit for a series energy storage device and a voltage-sharing system comprising the voltage-sharing circuit, and relates to the technical field of large-scale series energy storage cell voltage balancing. The invention aims at solving problems that the conventional energy storage cell balancing technology is low in modularization degree and is slow in balancing speed. In the voltage-sharing circuit, two ends of each energy storage cell are in parallel connection with one primary side winding, and a secondary side winding of a multi-winding transformer and an energy storage device are connected in series to form a closed loop, wherein the numbers of turns of i primary side windings are equal. Switching circuits are used for the charging and discharging of the energy storage cells between the energy storage cells and the primary side windings, and the drive signals of all switching circuits are the same. m cascaded half-bridge converts and oneBoost converter are employed to achieve the voltage balance between m voltage-sharing circuits.