42results about How to "Efficient charge and discharge" patented technology

The invention discloses an energy-saving control method for plug-in hybrid electric vehicles based on road traffic information. The energy-saving control method comprises the following steps: obtaining the real-time road grade, the traffic information of front vehicles, and the information of a next charging station from a global positioning system and an intelligent traffic system; establishing a three-dimensional mathematical model of a plug-in hybrid electric vehicle for predicting the vehicle state in the future; defining the power consumption of the vehicle and the optimum control problem of energy management at the power sustaining stage, and providing a functional equation for solving optimum control amount; performing real-time feedback optimum control, solving the optimum control amount so as to realize the optimum allocation for charging and discharging of a storage battery, adjusting and optimizing the energy flow of the plug-in hybrid electric vehicle on line according to the traveling conditions of the vehicle, obtaining the optimum performance of the system of the plug-in hybrid electric vehicle, and using a planetary gear mechanism as an continuously-variable electronic transmission, so that an engine works at an efficient region; predicting the charging state of the target storage battery according to the road traffic information, and adjusting the energy flow of the plug-in hybrid electric vehicle on line so as to achieve the purposes of saving energy and reducing exhaust.

A battery pack and its charging/discharging method enabling suppression of inactivation of a secondary battery by refreshing the secondary battery such as a nickel-hydrogen battery. A battery pack (101) comprises a cell group of interconnected secondary cells, i.e., unit cells, sensors for sensing temperature and voltage, display means for displaying the state of the cell group, a switch for controlling charging/discharging of the cell group, a calculation/control circuit (4) for allowing the display means to display the state of the cell group according to the signals from the sensors and generating a signal to operate the switch. The battery pack (101) further comprises a refresh request display means (13) for displaying a message to the effect that refresh charging/discharging is necessary. There is used a method in which when the voltage of the secondary battery reaches a discharge end voltage, refresh charging/discharging is automatically performed if the recovery voltage after a predetermined elapse of time is below a predetermined voltage. With this, even a secondary battery left for a long time and inactivated can be refresh charged/discharged.

An aluminum secondary battery includes a positive electrode 11, a negative electrode 12, and an electrolyte, wherein the positive electrode 11 includes an anion receptor such as polyaniline, the negative electrode 12 includes aluminum or an aluminum alloy, the electrolyte includes an aluminum salt, a sulfone, and a solvent with a dielectric constant of 20 or less, wherein the aluminum salt is typically AlCl₃ or the like, the sulfone is typically ethyl n-propyl sulfone or the like, and the solvent with a dielectric constant of 20 or less is typically toluene or the like.

A method and an apparatus are provided for controlling an output voltage of a direct current (DC) converter for a vehicle including a driving motor. The apparatus of controlling an output voltage of a DC converter for a vehicle including a driving motor includes a data detector that is configured to detect data for adjusting the output voltage of the DC converter and a controller that is configured to adjust the output voltage of the DC converter based on the data.

A power conversion controller includes: a correction-value calculating unit that calculates a correction value DE2 to correct a voltage value BEFC from a voltage signal BEFC that is obtained by converting the voltage value BEFC detected by a first voltage detector into a digital signal by an A/D converter and from a series-total voltage value EBAT detected by a second voltage detector; a corrected-voltage calculating unit that calculates a voltage signal BEFC1 as a corrected voltage value that is obtained by correcting the voltage value BEFC by the correction value DE2; and a gate controller that controls a power converting unit based on the voltage signal BEFC1

The present invention relates to cathode active material for a lithium secondary battery, and more specifically to cathode active material for a lithium secondary battery in which the concentration of the transition metal changes gradually in accordance with particle growth, thus changing the oxidation number of the transition metal and improving the stability of the crystalline structure, and thereby notably improving the high-rate charging and discharging characteristics.

The present invention relates to a method for cleaning the collector of the polymer lithium ion battery, especially a method for cleaning the copper or aluminum net collector for a plurality of times. The invention comprises the following procedures: A. doing ultrasonic cleaning to the copper or aluminum net collector of the punching with the cleaning liquid and then cleaning the collector with water; B. cleaning the collector with the acidic or alkali liquid; C. recleaning the collector with water. The present invention settles the problems of low production efficiency, high manufacturing cost, bad cleaning effect to the collector, causing the charging and discharging of the electric core, inferior multiplying factor discharging and battery circulating performance, etc. which exist in the batch type cleaning of the existing technique, and provides a collector cleaning method with the advantages of good safety, environment protecting, high production efficiency and good cleaning effect.

A heat exchanger with integrated thermal storage, for example, having a new tertiary side utilising phase change material in between and in thermal contact with the primary and secondary circuits, e.g. of a plate heat exchanger. The tertiary side helps reduce e.g. leak flows in district heating applications, or reduce energy losses in periods of low flow through the heat exchanger. By including thermal energy storage in a heat exchanger or reactor, response times of the systems are reduced as well as internal energy losses, and external energy storage units are reduced in number or are potentially rendered obsolete.

The invention relates to a doped modified lithium titanate composite material and a preparation method. The doped modified lithium titanate composite material is characterized in that the molecular formula of the lithium titanate composite material is LiaMpNqTixO12/C, wherein M and N are doped modified metal ions, a equals to 4, p is greater than 0, but less than 0.1, q is greater than 0, but less than 0.1, the sum of p and q is greater than 0, but less than or equal to 0.1, and the sum of p, q and x equals to 5. The invention also provides the preparation method of the doped modified lithium titanate composite material. Compared with a conventional preparation method of lithium titanate, the preparation method has relatively low reaction temperature and relatively short reaction time, also has the characteristics of simple preparation process, short preparation period, suitability of industrialized batch production. The modified lithium titanate prepared by adopting the preparation method has good charge-discharge, circulating and high-rate performances.

The invention discloses a battery pack equalizing circuit and an equalizing method. The battery pack equalizing circuit comprises a battery pack circuit, a switch selection circuit, an equalizer circuit and a measure and control unit; the battery pack circuit comprises n unit cells; the switch selection circuit is connected with the circuit pack circuit; the measure and control unit comprises a control module, a driving module, a voltage detection module and a current detection module; the voltage detection module is connected with each unit cell, and is used for detecting the voltage of eachunit cell; the current detection module is connected with the equalizer circuit, and is used for detecting the equalizing current; the control module is respectively connected with the equalizer circuit, the driving module, the voltage detection module and the current detection module; the driving module is connected with the switch selection circuit, and is used for equalizing the voltage of thebattery pack according to the control of the control module; and the equalizer circuit is further connected with the switch selection circuit, and is used for equalizing the current of the battery pack according to the control of the control module. The battery pack equalizing circuit and the equalizing method disclosed by the invention can adopt various equalization strategies to achieve charge and discharge equalization of the battery pack.

The present invention provides a construction machine comprising an engine and capable of using an external power source. The construction machine comprises a power storage device (14) that is charged by using the external power source, the construction machine is assisted by the power storage device when the output power of the engine (1) is insufficient, and also the construction machine efficiently utilizes the power storage device by using the amount of charge of the power storage device in a planned manner based on an operation time period and the controlling the amount of discharge of the power storage device based on load conditions. Specifically, the construction machine comprises: the engine (1); an auxiliary load (16) connected to the engine; an electric assist motor (2) driven by the engine; power converters (9, 10, 13) for converting an AC current output from the electric assist motor into a DC current; and the power storage device (14) connected to the DC side of the power converters, the power storage device being charged by the external power source by way of a charging device (15).

The invention discloses a storage battery charging and discharging online monitoring system. The system comprises an anti-thunder circuit, a bidirectional BUCK-BOOST converter, a storage battery, a first current detecting circuit, a first voltage detecting circuit, a PWM driving circuit, a processor, a second current detecting circuit, a second voltage detecting circuit, a short circuit protectioncircuit, a current limiting protection circuit, an overvoltage and undervoltage protection circuit, a temperature detecting circuit, a GAN communication module, a display circuit and an upper computer. The system can achieve fast and stable charging of the storage battery and real-time monitoring of electrical parameters, thereby prolonging the service life of the storage battery and saving the cost.

The invention discloses an alpine region new energy automobile lithium battery heat management system. The alpine region new energy automobile lithium battery heat management system comprises a lithium battery pack, a heating system, a control system and a working solution. Aluminum alloy serves as a heat-conducting sheet, the working solution serves as a heat-conducting medium, and the temperature of the working liquid is transmitted to the heat-conducting sheet and then is transmitted to the core of the lithium battery through the heat-conducting sheet, so that management on the temperatureof the lithium battery is realized. By the set of system, the lithium battery is stilled maintained to be at the optimal working temperature. In addition, when the control system detects that the rotating speed of a motor is zero and the temperature of the lithium battery is too low, ECU controls the heating system to work intermittently, so that an automobile can start rapidly. The alpine regionnew energy automobile lithium battery heat management system is simple in structure, safe, reliable, low in cost and high in practicability, and can accelerate the use of the electric automobile in the alpine region.

An elevator control device having a converter, an inverter, and a controller for controlling a motor to run an elevator according to alternating current with variable voltage and frequency from the inverter, and also having: an electric storage device (10) for storing the direct current , a thermistor (32) that detects the temperature of the electrical storage device, a charge and discharge control circuit (12) that controls the charge and discharge amount according to the detected temperature and outputs a drive signal, and performs a charge and discharge control circuit (12) for the electrical storage device according to the drive signal A charging and discharging circuit (11) for charging and discharging. This device can estimate the charging and discharging capability of the electric storage device, and can protect the electric storage device and suppress its rapid deterioration.

The invention is suitable for the technical field of chemical power sources, and provides a conductive material modified lithium-rich positive electrode and a preparation method and application thereof.The preparation method comprises the steps that a conductive material target material and a lithium-rich positive electrode material target material are subjected to co-deposition treatment in the mixed atmosphere of working gas and oxygen, a composite lithium-rich material grows on a substrate, and the composite lithium-rich positive electrode is obtained; and annealing to obtain the modified lithium-rich positive electrode. According to the preparation method, uniform compounding is achieved on the nanoscale through codeposition treatment, meanwhile, the placed conductive material forms a good three-dimensional conductive network in the pole piece, and the effect of a buffer structure is achieved while a stable CEI film is formed through induction. The modified lithium-rich positive electrode has high energy storage density and high reversible capacity, and the conductive material compounded in the modified lithium-rich positive electrode is used as a good electronic conductor, so that the resistance of a solid-state electrode can be greatly reduced, and the rate capability of the battery is improved. The energy density of the lithium ion battery assembled by the modified lithium-rich positive electrode and the silicon-carbon negative electrode is higher than 350Wh/kg, the voltage interval is 2-5V, and the safety of the battery is good.

A charging and discharging management system according to the present disclosure is a system for, in regard to a vehicle on which a battery capable of being charged and discharged is mounted, chargingand discharging the battery, the charging and discharging management system including: an information collection unit configured to collect boarding information indicating an aircraft which a driverof the vehicle plans to board, the vehicle being parked in a parking lot in an airport; a parking period acquisition unit configured to acquire a parking period of the vehicle based on the boarding information pieces collected by the information collection unit; and a determination unit configured to determine a timing at which the battery mounted on the vehicle is charged and discharged based onthe parking period acquired by the parking period acquisition unit.

The invention discloses a supercapacitor, electrodes therefor, and a method for preparing an active material of electrodes, and the method comprises the following steps: S1, sequentially placing a copper piece in hydrochloric acid and deionized water; S2, enabling the copper piece to be immersed in a mixed solution of NaOH and (NH4)2S2O8 till the color of the copper piece is changed into blue fromorange; S3, taking out the copper piece, and washing the copper piece through water and ethyl alcohol; S4, drying the copper piece, and obtaining a tubular copper hydroxide active material growing onthe surface of the copper piece. The method promotes the invertible redox reaction of the electrode, achieves the quick charging and discharging of the electrode, prevents the ineffective area from increasing after a binder is added to a conventional powder material, solves the problems that the loosening is liable to happen the thermal conductivity and electric conductivity are poor, and obtainsthe better circularity. Meanwhile, the method is simple, is low in cost, causes no pollution, is low in energy consumption, and is suitable for batch production.