5952 results about "Electric cars" patented technology

An apparatus and method for sequentially charging multiple electric vehicles. The apparatus including an electric vehicle supply equipment (EVSE) having an electrical plug connected to a power cord. The power cord is connected to a housing containing a number of electrical components configured to control the power flow to an electric vehicles to recharge the vehicles' batteries. The power cord is divided into multiple power cords that extend from the housing and connect to standard electric vehicle connectors compatible with battery electric vehicles (BEV) and plug-in hybrid electric vehicles (PHEV). The EVSE determines, based on a number of possible criteria, which of the multiple electric vehicles to charge at a given time.

A permanent magnet rotating electric machine comprises a stator having stator windings wound round a stator iron core and a permanent magnet rotor having a plurality of inserted permanent magnets in which the polarity is alternately arranged in the peripheral direction in the rotor iron core. The rotor iron core of the permanent magnets is composed of magnetic pole pieces, auxiliary magnetic poles, and a stator yoke, and furthermore has concavities formed on the air gap face of the magnetic pole pieces of the rotor iron core of the permanent magnets, gently tilting from the central part of the magnetic poles to the end thereof. In a permanent magnet rotating electric machine, effects of iron loss are reduced, and an electric car using highly efficient permanent magnet rotating electric machine are realized.

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.

An integrated and isolated onboard charger for plug-in electric vehicles, includes an ac-dc converter and a dual-output dc-dc resonant converter, for both HV traction batteries and LV loads. In addition, the integrated and isolated onboard charger may be configured as unidirectional or bidirectional, and is capable of delivering power from HV traction batteries to the grid for vehicle-to-grid (V2G) applications. To increase the power density of the converter, the dual-output DC-DC resonant converter may combine magnetic components of resonant networks into a single three-winding electromagnetically integrated transformer (EMIT). The resonant converter may be configured as a half-bridge topology with split capacitors as the resonant network components to further reduce the size of converter. The integrated charger may be configured for various operating modes, including grid to vehicle (G2V), vehicle to grid (V2G) and high voltage to low voltage, HV-to-LV (H2L) charging.

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.

The invention discloses an internet electric car charging point managing system and method. In the system, a server, a charging point and a mobile terminal in an area are linked via an ad-hoc network way; and multi-charging modes, multi-paying ways and multi-charging point navigation selections can be achieved with the cooperation of multifunctional modules of the mobile terminal. The ad-hoc network can be realized, so a user can easily check near charging point states and observe parking lot states; the user can select a navigation position and make charging arrangements; the internet electric car charging point managing system and method has information monitoring and alarming functions, so during the charging period, the electric car under the charge can be monitored; theft and robbery of the electric car can be prevented; and the internet electric car charging point managing system and method has various charging modes and various paying methods, so the user can charge according to practical conditions.

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.

The invention discloses a driving range estimation method of an electric car. The driving range estimation method of the electric car comprises the following steps: 1.1 a planned route and the future microcosmic traffic state of the route are obtained according to a set departure site, a destination and the departure time; 1.2 an aggregative variable is calculated based on the obtained speed per second and an acceleration; 1.3 a built electric car electricity consumption rate model is selected according to different driving conditions, and electricity consumption per second is calculated by combining the calculated aggregative variable; and 1.4 residual electric quantity of a current battery is obtained, residual energy of the battery is calculated, and residual range is obtained through circular calculation by combing the electricity consumption of the car. The driving range estimation method of the electric car takes the influence of a real traffic state on the energy consumption of the electric car into account, and overcomes the defect that the estimation result of an existing method is not accurate enough.

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.

Foldable electrical vehicles and related charging infrastructure are described. The foldable electrical vehicle generally includes three structural armatures (front and rear wheel-bearing armatures and a seat-bearing armature) that are pivotally interconnected along their lengths such that they may be pivoted between a closed position wherein the three armatures are disposed roughly parallel to each other in a compact folded configuration, and an open riding configuration wherein an angular relation is formed between the armatures.

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.

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.

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.

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.

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.

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.

The invention provides a direct current micro-grid coordination control method of a light storage electric car charging station, and relates to the micro-grid technology field. The technical problem is solved that a direct current bus voltage is kept smooth and stable. The method employs a storage battery and flywheels for hybrid energy storage, a direct voltage is divided into five levels from high to low, layered coordination optimization control of a direct current bus is carried out, and coordination optimization control of photovoltaic power generation, electric car charging and discharging, load power requirements and grid side converter charging and discharging in a charging station direct current micro-grid is carried out. The method can keep balance of the system power in different operation modes of charging station micro-grid island and grid connection and achieves stable control of a direct current bus voltage.

A secondary battery and charging system are provided within an electric car or other electric drive vehicle. The secondary battery may, e.g., be owned by the electric utility. The battery is removable and can be charged and discharged independently of the primary car battery system. The utility can use the secondary battery to implement vehicle-to-grid functionality.

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.

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.

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.

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.

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.

A control signal is superimposed on an AC power at the time of charging the battery of an electric car in a non-contact manner by electric power outputted from a feeding apparatus. A feeding apparatus 11 includes a carrier oscillator 21 for outputting an AC power, an ASK modulator 22 for superimposing a control signal on the AC power outputted from the carrier oscillator 21 according to the ASK modulation method, a power amplifier 23 for amplifying the AC power modulated by the ASK modulator 22, and a first resonance coil 24 for outputting the AC power amplified by the power amplifier 23. A charging apparatus 12 to be provided on an electric car includes a second resonance coil 31 for receiving the AC power transmitted from the first resonance coil 24, an ASK demodulator 34 for demodulating the received AC power to thereby extract the control signal, and a rectifier 33 which rectifiers the received AC power to obtain a DC power and supplies the DC power to a battery 35.

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.

The invention discloses a method for rapidly recognizing a life decline characteristic of a power battery system. Based on a pre-established relationship between a polarized internal resistance increase rate and a capacity retention rate, voltage and current data for parameter recognition are acquired under an actual operating condition of an electric car, on-line parameter recognition is performed by a vehicle-mounted computer, and the actual capacity of a battery can be obtained on line without full charge, full discharge or other operations on the battery; the polarized internal resistance increase rate and the capacity retention rate are used as an input and an output, so that influence of inconsistency of the internal resistance and the capacity between batteries on capacity prediction is avoided. The recognized model internal resistance parameters can be not only applied to capacity estimation, but also applied to SOC estimation and the like.

The transportation system in this invention provides vehicle coupling units which allow the electrical connections and reconfigurations of two or more vehicles together at highway speeds. The coupling unit provides for the bidirectional exchange of electrical power between these vehicles to meet the various power demands of each vehicle. The system is designed to permit coupling and decoupling process of the vehicles while they are traveling at highway speeds. To facilitate the coupling event, each vehicle will employ vehicle active steering, vehicle active suspension, and coupler joint articulation, which will be under vehicle computer control, and will employ vehicle to vehicle data communication. This transportation system allows the electric vehicles to electrically and mechanically couple together for flexible electrical power sharing to achieve the extension of the range of electrically powered vehicles to minimize the time needed for stationary re-charging of electrical vehicles required by electrical charging stations.

The invention discloses an energy-saving hub motor comprising a hub, a motor, a fixed shaft, a storage battery, a controller, a rectifying device and a second control switch which is controlled by the controller, wherein the hub and the fixed shaft are rotatablely connected; the motor comprises at least one first stator, a second stator and at least one rotor corresponding to the stators; the stators are fixedly connected with the fixed shaft; the stators comprise stator racks and coil windings which are fixed on the stator racks; the stator racks are fixedly connected with the fixed shaft; the hub is the rotor; magnets for clamping the stator coil windings are arranged in the hub; and the coil winding of the second stator is connected with the storage battery after being connected in series with the second control switch and the rectifying device. During braking, the controller controls the second control switch to be closed to charge the storage battery by using the electric energy generated by the coil winding of the second stator. The energy-saving hub motor can be applied to the wheels of electric cars.

The invention discloses an electric vacuum servo device control strategy of an electric car brake. The control strategy comprises the following steps: a vacuum pump control unit is used to control the on/off of a vacuum pump according to the collected signal of a vacuum pressure switch arranged on a vacuum tank and the output signal of a brake switch connected with a brake pedal or a pedal opening sensor, and the vacuum pump control unit is used to perform systematic failure diagnosis according to the output signal of the brake switch or the pedal opening sensor, the signal of the vacuum pressure switch and the operation time of the vacuum pump. By adopting the method of the invention, the problems of large energy consumption of the vacuum pump and poor system reliability can be solved.

The invention relates to a double-wheel self-balancing electric vehicle without a handle using the gravity center to control direction and a control method thereof. The double-wheel self-balancing electric vehicle is characterized by comprising an electric vehicle body, the electric vehicle body comprises a frame arranged in the electric vehicle and a shell arranged outside the electric vehicle, the frame comprises a left hub frame, a right hub frame and a connecting shaft arranged between the left hub frame and the right hub frame, the connecting shaft is used for connecting the left hub frame with the right hub frame, each of the left hub frame and right hub frame is provided with a pedal plate, a tire component is arranged at each of two sides of the electric vehicle body, a control circuit is arranged in the electric vehicle body, and the control circuit controls the advancing and reversing of the vehicle through the motor through detecting the front and back gravity center change of an operator.