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5952 results about "Electric cars" patented technology

SOC (State of Charge) and SOH (State of Health) prediction method of electric vehicle-mounted lithium iron phosphate battery

The invention discloses an SOC (State of Charge) and SOH (State of Health) prediction method of an electric vehicle-mounted lithium iron phosphate battery, which comprises the following steps of: (a) improving a Thevenin cell equivalent model; (b) determining the state equation and the output equation of a system; (c) identifying battery model parameters; (d) using a Kalman filter algorithm to iterate the state variables of the system, so that the predictive value of SOC is closer to the actual value; and (e) using a dual-channel Kalman filter algorithm to carry out the online predication of an internal resistance and capacity of the lithium iron phosphate battery, and simultaneously predicating the SOH of the battery according to the changes in the internal resistance and the capacity value of the battery in the current state and the initial state. With the method, the predication precision of SOH of the battery is effectively improved, the decline in battery performance can be determined more accurately, and the internal resistance and capacity information of the battery is combined to provide a basis for making the battery management strategy and maintaining and replacing the battery.
Owner:SOUTHWEST JIAOTONG UNIV +1

Intelligent battery management system of electric car

The invention relates to an intelligent battery management system of an electric car. In the invention, a core control module is connected with N battery data collecting modules via a K bus and is connected with a charging module, a battery pack monitoring module and a touch screen display system; the battery management system comprises a database management module, the battery pack monitoring module, a self-checking control module and an abnormal control module; the battery data collecting modules are provided with a plurality of battery data collecting control chips; and the core control module is connected to computer control software by utilizing a universal serial bus (usb) interface. The battery management system provided by the invention has the advantage of solving the problems that real-time and dynamic comparison cannot be carried out, a corresponding fault processing function and a mutual information platform are lacked and the like in the past. The invention realizes that data such as voltage, current, temperature and the like of a battery are subjected to acquisition, SOC (State of Charge) estimation, real-time communication, equalization and insulation monitoring and compared with each standard datum in a database, so that a dynamic contrast model is established; and due to the adoption of a layered pattern, the control modules are used for controlling the voltage, the current and the temperature. The interaction with users and the warning are carried out through a touch screen.
Owner:江苏南极星新能源技术股份有限公司

Electric car charging service billing system based on two-dimension codes and implementation method of electric car charging service billing system

The invention discloses an electric car charging service billing system based on two-dimension codes and an implementation method of the electric car charging service billing system. Autonomous charging services are conducted by using charging piles, handheld mobile terminals and a charging network system management platform, each charging pile is provided with the unique identification two-dimension code and is used for providing electric car charging services for users, the handheld mobile terminals achieve the functions of two-dimension code scanning, user login and communicating with the charging network system management platform to achieve autonomous services and consumption information displaying with mobile phones or tablet computers, and the charging network system management platform is communicated with the charging piles to achieve the functions of controlling and charging service data collecting, and is communicated with the handheld mobile terminals to achieve the functions of user identifying, charging pile identifying, autonomous user services and consumption information displaying. According to the electric car charging service billing system based on the two-dimension codes and the implementation method of the electric car charging service billing system, smart phones which are widespread currently are fully used as application platforms, the system identifies the users and the charging piles used by the users in the mode of two-dimension code scanning, and value storage and consumption are achieved through network payment.
Owner:山东璞润电力科技有限公司

Secondary battery pack charging and discharging management system

The invention provides a secondary battery pack charging and discharging management system. The secondary battery pack charging and discharging management system comprises a battery pack, a step-up and step-down module and a main control module, wherein the battery pack is formed by a plurality of individual battery modules through serial connection; a self-control part of each individual battery module is used for controlling a serial-in switch and a bypass switch to be turned off or turned on; the main control module is used for generating a signal for controlling a battery pack step-up and step-down circuit short-circuiting switch and a signal for selecting a single battery to be serially connected into the battery pack according to the working state of the battery pack, and controlling a step-up and step-down circuit to adjust charging and discharging voltage and current. By adopting the secondary battery pack charging and discharging management system provided by the invention, under the situation that the capacity and the internal resistance of each single battery are different, the utilization ratio, the service life and the safety of the entire battery pack are improved; by calculating balance use battery quantity, under the situation that any step-up circuit is not used, different voltage can be obtained; the operating costs of electricity-consuming equipment such as electric vehicles which use the secondary battery pack charging and discharging management system can be reduced and the overall working efficiency of the equipment is improved.
Owner:长春市北极星科技有限责任公司

Electric car running power management system

The invention relates to an electric car power management and monitoring system in the technical field of electric cars. The system comprises an electric car running power dynamic management module, a battery maintenance system, a remote monitoring system, an electric car induction service system and an intelligent analysis platform, wherein the battery maintenance system is connected with various sensors on the electric car and used for acquiring data information and feature parameters; the electric car running power dynamic management module is connected with the battery maintenance system;the remote monitoring system is connected with the battery maintenance system to obtain positioning information from the battery maintenance system on the electric car; the intelligent analysis platform is connected with the electric car running power dynamic management module and used for transmitting model parameter information; and the electric car induction service system is connected with the intelligent service platform system and used for transmitting service queue information and service demand information shared in the network of electric car users. The invention can accurately forecast the residual service life of the battery of the electric car and realize the dynamic management of the running power condition of the electric car.
Owner:SHANGHAI JIAO TONG UNIV

Drive control method for all-electric car

The invention discloses a drive control method for an all-electric car. The drive control method aim at solving the problems that division of working modes during a finished automobile driving running is not considered, a torque compensation function is not considered in the running process of other vehicles except flooring of an accelerator pedal, and united efficiency of a power component is not considered in goal torque setting. The drive control method for the all-electric car comprises the steps of utilizing a finished automobile controller to automatically identify a finished automobile working mode according to current finished automobile acceleration mean values and an acceleration mean square errors, and enabling the finished automobile working mode to be one of a common mode, a power mode and an economic mode; working out an expected torque Treq under the corresponding mode according to a goal working mode control strategy in the finished automobile controller after the working mode identification is finished; restraining and correcting the expected torque Treq according to a power limiting value strategy in the finished automobile controller after the expected torque Treq under the goal working mode is obtained, and if a finished automobile has no major failure at the time, outputting ultimate goal torque commands to a motor.
Owner:JILIN UNIV

Electric car frame structure for distributed installation of battery packs

The invention provides an electric car frame structure for distributed installation of battery packs. The electric car frame structure comprises a framework type car frame, a block-based battery pack structure, a sealing board and a floor, wherein the framework type car frame comprises a front car beam (1), a rear car beam (2), a conical multi-cell thin-wall pipe structure (3) and a threshold structure (4); the front car beam (1) is located at the front end of the framework type car frame, the rear car beam (2) is located at the rear portion of the framework type car frame, the front car beam (1) and the rear car beam (2) are connected through longitudinal energy absorption structures on the left side and the right side in an orthometric energy absorption structure (7), and the threshold structure (4) and the orthometric energy absorption structure (7) are in transitional connection through the conical multi-cell thin-wall pipe structure. The implementation mode is easy, convenient and fast, the number of parts is decreased, the utilization rate of materials is improved, the manufacturing process of the integrated structure is simplified, the structure lightweight design is achieved, and meanwhile the crash safety performance is improved to a great extent.
Owner:HUNAN UNIV

Method for estimating driving range of electric car

ActiveCN103273921AAccurate calculation of mileageReduce Range AnxietyPower batteryElectricity
The invention discloses a method for estimating the driving range of an electric car. The method comprises the steps of obtaining a current measuring value of a power battery, and calculating a current status value of the battery; obtaining a historical energy consumption value and the historical driving cycle of the whole car, predicting the future driving cycle, and calculating a predicted value of the future energy consumption of the whole car; predicting the residual usable energy of the power battery under the predicted value of the future energy consumption of the whole car according to the predicted value of the future energy consumption, the current measuring value of the battery and the current status value of the battery through an electricity-heat coupling model of the battery; and calculating the driving range of the electric car according to the predicted value of the future energy consumption of the whole car and the residual usable energy. According to the method, the residual usable energy of the power battery under the future running condition is predicted, and the accurate driving range of the electric car is calculated through prediction of the future driving cycle and by prediction of energy consumption of the car in a future period by combining the energy consumption model of the whole car, so that the mileage anxiety of passengers is reduced.
Owner:四川新能源汽车创新中心有限公司

System for mutual charging of electric automobiles and charging connector

The invention provides a system for mutual charging of electric automobiles. The system comprises a first electric automobile, a second electric automobile and a charging connector, wherein each of the first electric automobile and the second electric automobile comprises a power battery, a battery management device and a charging/discharging socket; the charging connector is connected between the first electric automobile and the second electric automobile; two ends of the charging connector are respectively provided with a first charging gun connector and a second charging gun connector; the first charging gun connector is connected with the charging/discharging socket of the first electric automobile; the second charging gun connector is connected with the charging/discharging socket of the second electric automobile; and when the first electric automobile enters a discharging state, the second electric automobile enters a charging state, so that the first electric automobile charges the second electric automobile through the charging connector. The electric automobiles can be mutually charged, the problem that the electric automobile is inconveniently charged due to few charging stations is solved, and the system is conveniently used by a user. The invention also provides the charging connector.
Owner:BYD CO LTD

Battery remaining capacity estimation method for electric car battery management system

The invention discloses a battery remaining capacity estimation method for an electric car battery management system. The method comprises the following steps of initializing the initial battery remaining capacity of a battery; predicting the remaining battery capacity of the battery at a next moment by adopting an ampere-hour current integral method so as to obtain a current polarization state through a current polarization model; estimating an open-circuit voltage according to an open-circuit voltage model; estimating the battery voltage; comparing the real sampled voltage and the estimated battery voltage, and calculating a voltage error; acquiring the corrected remaining battery capacity by adopting a kalman filter model; and introducing a temperature and battery service life compensation strategy, and estimating the remaining battery capacity according to the corrected remaining battery capacity. By adopting the method, the calculation complexity and the requirement on the battery model precision can be alleviated, and the method is particularly suitable for estimating the remaining battery capacity of the electric car power battery under relatively wicked environmental factors such as severe discharging current variation and the temperature.
Owner:AIWAYS AUTOMOBILE CO LTD

Electric car intelligent charging system and method on basis of mobile device

The invention provides an electric car intelligent charging system and method on the basis of a mobile device and belongs to the technical field of electric car charging positive intelligent control. The system comprises a power grid management center, a station level management server, the mobile device, a charging device and a power battery. The station level management server comprises a data input module, a data processing module, a data feedback module and a historical data memory module and is used for calculating, solving and achieving the real-time optimum order charging scheme, outputting specific charging orders to the charging device and the mobile device and feeding back the charging information. According to the method, the local optimum greedy algorithm is used for solving the real-time optimum order charging scheme, the user interaction character is achieved, and the order charging scheme of an electric car is obtained by carrying out data mining and predicting on the user data and the power grid data and carrying out performance analysis on the power battery. Under the circumstance of ensuring that battery loss is small, the electric car intelligent charging system and the method greatly meet the individual requirements of the users and achieve effective optimization of a power grid.
Owner:贾英昊

Method for quickly supplementing electric energy of electric vehicle and power supply unit thereof

The invention relates to a method for quickly supplementing electric energy of an electric vehicle and a power supply unit thereof. The method is characterized in that a rechargeable battery pack is arranged on the electric vehicle, and a battery replacement unit, a charging library and a battery library are arranged in a power plant, wherein the rechargeable battery pack comprises a battery box and standardized standard battery units; a battery chamber is internally provided with a plurality of standard battery unit stations; guide rails are installed along with the load direction of the standard battery units; when the standard battery units operate, the standard battery units are arranged in the battery box and can smoothly load and unload in the battery box along the guide rails; after the standard battery units are in place, battery electrodes contact with electrode touching rails which are connected mutually by fixed series-parallel circuits; and the rechargeable battery pack is assembled on the electric vehicle. When it is required to supplement the electric energy, the electric vehicle enters the power plant, so that the standard battery units which are lack of electric energy are replaced by the standard battery units which are charged in the battery box. The power supply unit provided by the invention is convenient to use and reliable in performance, especially applied to quickly supplementing the electric energy for the electric vehicle, and having broad application prospects.
Owner:尹学军

Electric car air conditioning system with air source heat pump

The invention discloses an electric car air conditioning system with an air source heat pump. The electric car air conditioning system has a refrigerating mode, a conventional heating mode, a low-temperature heating mode and a defrosting mode in an electric car, and a main loop of the air conditioning system comprises a compressor, an indoor condenser arranged on an outlet pipeline of the compressor, an indoor evaporator arranged on an air return pipeline of the compressor, an outdoor heat exchanger arranged on a pipeline between the indoor condenser and the indoor evaporator, a first valve arranged between the indoor condenser and the outdoor heat exchanger, a second three-way valve arranged between the outdoor heat exchanger and the indoor evaporator, and a first throttling device arranged between the second three-way valve and an inlet of the indoor evaporator. A by path of the second three-way valve is connected with an inlet of the compressor. In the low-temperature heating mode of the air conditioning system, a middle air supplementing system operates, and the electric car air conditioning system has the advantages of being reliable in operation, high in heating capacity, high in heating efficiency and the like.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI

Water system high-voltage mixed ion secondary battery based on zinc-lithium ferric manganese phosphate

The invention relates to a water system high-voltage mixed ion secondary battery. A positive pole material of the battery is a high-voltage battery positive pole material, namely zinc-lithium ferric manganese phosphate (LiFe1-xMnxPO4), the element zinc serves as the majority of a negative pole material, and electrolyte is a liquid-state or gel-state material which is formed by lithium bis(trifluoromethane sulfonimide) (LiTFSI) and soluble zinc salt as solute and water as solvent and has ionic conductivity. The battery is based on the energy storage mechanisms of a dissolution-out/deposition reaction of zinc ions (Zn2+) on a negative pole and a reversible embedding/ejection reaction of the zinc ions (Zn2+) on a positive pole, meanwhile, through the water-in-salt electrolyte formed by high-concentration LiTFSI, the electrochemical water decomposition process is inhibited, a potential window of the water system electrolyte is remarkably broadened, the zinc-lithium mixed ion secondary battery has the advantages of being high in capacity, long in cycling life, safe, environmentally friendly, low in cost and the like, and the battery can be applied to the fields such as consumer electronic equipment, electromobiles and large-scale energy storage.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI

Small-size automatic power exchanging station

The invention belongs to the field of electric car power distribution and particularly provides a small-size automatic power exchanging station. The small-size automatic power exchanging station aims at solving the problems that an existing power exchanging station is large in land occupation area, civil engineering needs to be conducted, transportation is difficult, and full-automatic power exchanging cannot be conducted. For the purposes, the small-size automatic power exchanging station comprises a battery bin, a power exchanging platform, a power exchanging system and a control system. The battery bin is used for storing a battery and charging the battery. The power exchanging system is used for replacing a battery of an electric car with the battery of the battery bin. The power exchanging platform is used for parking the electric car and lifting the electric car through a lifting device. According to the small-size automatic power exchanging station, the electric car is lifted up through the lifting device, the power exchanging platform and the battery bin are wrapped up through a container at the same time, therefore, any civil engineering does not need to be conducted, the power exchanging station can be overall carried, the position of the power exchanging station can be arranged flexibly, and the size of the power exchanging station can be freely expanded as required.
Owner:NIO NEXTEV LTD

Multi-intelligent agent based unmanned electric car automatic overtaking system and method

ActiveCN106671982ARealize dynamic coordinationImplement executive controlExternal condition input parametersFuzzy sliding mode controlSimulation
The invention relates to a multi-intelligent agent based unmanned electric car automatic overtaking system and method. The automatic overtaking system includes a vehicle-mounted sensor for acquiring front traffic information of an unmanned electric car. The automatic overtaking method includes: establishing a minimize safe distance model on the basis of feature information of a car and a surround environment thereof extracted by a vehicle-mounted sensing system and a V2X communication system; setting a sine function form as a base function of an automatic overtaking desired path, and dynamically planning an automatic overtaking desired track of the unmanned electric car in real time; adopting a self-adaption fuzzy slide mode control technique to solve the desired speed and the desired yaw velocity of overtaking of the unmanned electric car on the basis of a deviation between the desired overtaking path and an actual path; adopting a multi-intelligent agent genetic optimization algorithm to calculate out the required longitudinal and horizontal force of each wheel of the unmanned electric car; and establishing a mapping model from the longitudinal and horizontal forces of the wheels of the unmanned electric car to the desired slip angle and slip rate, and achieving execution control of the longitudinal and horizontal force of tires the unmanned electric car.
Owner:XIAMEN UNIV
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