88 results about "Electric vehicle" patented technology

The invention belongs to the field of power battery management of electric vehicles and in particular relates to a method for estimating and revising the state of charge (SOC) in a battery management system of an electric vehicle. The method mainly comprises the following steps of: firstly, calculating the current SOC of a battery; and secondly, revising the SOC for influence of battery temperature, battery ageing and a current integration accumulated error on the SOC, wherein for the influence of the battery temperature and the battery ageing on the SOC, the SOC of the battery is revised by calculating revising factors of the battery temperature and the battery ageing and using the revising factors, and for the influence of the current integration accumulated error on the SOC, revising of the SOC is determined by judging discharging current and duration time. The method has the advantages that: by revising the SOC for the influence of the battery temperature, the battery ageing and the current integration accumulated error on the SOC, influencing factors of the error can be quite conveniently eliminated, and the revising accuracy of the SOC is improved.

An electric vehicle includes a control unit having overcurrent generation judgment unit, inverter selection unit, and inverter drive control unit. The overcurrent generation judgment unit judges whether an overcurrent is generated in an inverter for generation or an inverter for travel. When an overcurrent is generated in one of the inverters, the inverter selection unit selects the other inverter to be driven. The inverter drive control unit stops the driving of the one inverter and drives the other inverter to drive a travel motor or a generator.

The invention relates to an electric vehicle, a battery box body thereof, and a battery box. A cooling structure is arranged on a bottom plate assembly of the battery box and comprises two or more layers of hollow channels which are formed at intervals in vertical direction, the upper hollow channel forms a cooling channel used for allowing cooling liquid to circulate, and the lower hollow channelis filled with a thermal insulation material; and in the operating process of the battery box, the cooling liquid in the cooling channel can cool a battery module in the battery box. Meanwhile, the lower hollow channel is filled with the thermal insulation material, thus a thermal insulation layer is formed, heat in the external environment is prevented from being transmitted into the battery box, through the thermal insulation material, the heat in the external environment is prevented from influencing the cooling liquid, and the problem that properties of the battery box are influenced accordingly is solved; and after the bottom plate assembly is filled with the thermal insulation material, the weight of the bottom plate assembly can also be lowered obviously, hollow structures are arranged, and thus the structural strength of the bottom plate assembly can further be ensured.

The invention provides a charging system combining a power integrated body of the inner space of a vehicle and an outer charging suspension. The charging system aims at overcoming the defect that a few outer charging piles are available when existing electric vehicles have charging requirements. According to the design, a structure which combines the power integrated body used for charging the electric vehicle and installed in the vehicle, and the outer charging suspension outside the vehicle and is suitable for receiving a power source of the inner space of the vehicle is provided. The power integrated body installed in the inner space of the vehicle and composed of a charging pile, a suspension wire, a plug and an accessory is combined with a power supply device, namely a suspension wire and a conventional socket, on the outer charging suspension outside the vehicle through a power receiver, namely a suspension wire and a conventional plug, via a cantilever or a fixed suspension or a movable suspension or a multi-movable suspension in the inner space of the vehicle or above the occupation portion of the vehicle or above the height of the human body on the near side of the vehicle. The electric vehicle can be easily charged in a place with a civil power source, and in combination with a handheld device and the movable suspension which are carried in the vehicle, the limitation of the distance between a power grid power source and a parking place is overcome to the best.

A safe power supply circuit of the invention comprises a single-chip microcomputer control circuit, a loop protecting circuit and a voltage reducing and stabilizing power supply circuit which supplies electric power to the single-chip microcomputer control circuit. The output end of the loop protecting circuit is connected with a voltage detecting circuit. One end of the output end of the voltage detecting circuit is connected with the single-chip microcomputer control circuit, and the other end is connected with a loop switch protecting circuit. The output end of the loop switch protecting circuit is connected with a current detecting circuit. The output end of the current detecting circuit is connected with the single-chip microcomputer control circuit. The output end of the single-chip microcomputer control circuit is connected with a voltage detecting circuit. The safe power supply circuit can settle the problems of no protecting measures for overvoltage, overcurrent and reverse charging; and incapability of realizing automatic matching between a charger and an anode and a cathode of a battery. Higher safety and higher user-friendly performance of an electric vehicle are realized.

The invention relates to a system and method for making vehicles automatically driven out of narrow lateral parking spaces and an electric vehicle. The system comprises an environmental information obtaining unit configured to obtain information of front parking spaces, back parking spaces and an ambient environments of the narrow lateral parking spaces where vehicles are parked, a scene re-establishment unit configured to re-establish three-dimensional scenes in certain ranges of the vehicles based on the obtained information of front parking spaces, back parking spaces and an ambient environments, and a control unit configured to calculate steering wheel turning angles for driving-out strategy selection according to the re-established three-dimensional scenes, determine driving-out strategies and corresponding driving-out routes according to the calculated steering wheel turning angles and control vehicle owners to execute driving-out operation according to the driving-out routes.

The invention discloses a hill-start anti-skid control method of an electric vehicle. At the hill start, the torque of a motor gradually increases based on the hill-start stated threshold value Tp after an EPB is released through a hill anti-skid control system and method; when a skidding phenomenon occurs, the torque stops increasing and rapidly decreases to the hill-start stated threshold valueTp; when the skidding phenomenon disappears, the vehicle speed increases steadily, the torque of the motor increases to the target value Td gradually, matching of the driving force of the motor and the braking force of the EPB are controlled to make the vehicle start smoothly, and the driving force is not too large. The skidding phenomenon of the vehicle in the hill start condition is avoided, adaptability and flexibility of torque control are better; the hill-start anti-skid control method of the electric vehicle avoids the skidding phenomenon of the vehicle in the hill start condition, and adaptability and flexibility of torque control are better; and the climbing performance of the vehicle is improved, the dynamic performance is ensured, ride smoothness and comfort of the vehicle are improved, and better driving experience and driving safety performance are obtained.

An electric vehicle charging connector device comprises a plug connector and a receptacle connector docking with the plug connector. The plug connector includes a first insulating body, a first circuit board, a plurality of contact terminals, a first electrode unit and a first jumper unit. The receptacle connector includes a second insulating body, a second circuit board, a plurality of docking terminals, a second electrode unit, a second jumper unit and a waterproof ring. The first jumper unit of the plug connector and the second jumper unit of the receptacle connector are respectively secured on the first electrode unit and the second electrode unit by a riveting way which allows a firm electrode connection and low probability of looseness between the plug connector and the receptacle connector so as to ensure a stability and accuracy of electricity transmission and a battery charge integrity.

The invention discloses water-based flashing paint suitable for ordinary aluminum powder and a preparation method thereof. The water-based flashing paint is acrylic acid amino baking varnish, and the aluminum powder which is not processed can be directly added into a water-based formula, and the storage stability is good. The water-based flashing paint comprises, by weight parts, 6-10 parts of aluminum powder, 5-8 parts of cosolvent, 80-90 parts of paint oil. The paint oil comprises, by weight parts, 50-55 parts of water based hydroxy acrylic resin, 8-15 parts of amino resin, 0.3-0.5 part of N,N-dimethylethanolamine, 10-20 parts of water, 5-10 parts of cosolvent A, 0.1-0.3 part of base material wetting agent and 0.2-0.5 part of flatting agent. The prepared water-based flashing paint is suitable for the fields such as electric vehicles and motorcycles, not only meets environmental protection requirements and has the performance not lower than that of a solvent based coating, but also has a lower comprehensive cost than the solvent based coating, and the span of replacing an oil paint with the water-based paint is implemented.

A damping control device for an electric vehicle is having a continuously variable transmission between a motor and left and right front wheels. The damping control device drive system includes a feedback control unit, which suppresses a vibration accompanying a disturbance in the rotational speed of the motor, and an operation determination unit, which determines whether or not an absolute value of a second-order differential of the transmission ratio is equal to, or greater than, a predetermined value, wherein when the absolute value of the second-order differential of the transmission ratio is equal to, or greater than, the predetermined value. The feedback control unit performs control of the output torque of the motor whereby a compensation torque component for suppressing a vibration accompanying a gear shift is subtracted from a compensation torque.

The invention discloses a soft package lithium ion battery module for an electric vehicle. The soft package lithium ion battery module comprises soft package lithium ion battery units, a bottom plate, an upper cover and fastening bolts, wherein each soft package lithium ion battery unit comprises a soft package lithium ion battery and a heat radiating plate, the heat radiating plate is basically in a rectangular structure, and is composed of at least one basically rectangular box body, one slot extends from each of end parts of three side surfaces of the box body, the soft package lithium ion battery is arranged in the box body of the heat radiating plate, and the soft package lithium ion battery and the box body integrally form the soft package lithium ion battery unit, and at least two soft package lithium ion battery units are overlapped along the vertical direction and are fixedly installed between the bottom plate and the upper cover through the fastening bolts to form the soft package lithium ion battery module. The battery units can be flexibly expanded to bring the convenience for arrangement. Slots of adjacent heat radiating plates form an air duct, thus the heat radiation of each battery is facilitated. The soft package lithium ion battery module provided by the invention is compact in structure, convenient to maintain and easy to expand, has a function of protecting the batteries, is convenient to electrically connect, and good in heat radiation property because the battery units are mutually isolated. The soft package lithium ion battery module has a remarkable function for prolonging the service life and improving the energy density of a lithium battery pack of the electric vehicle, and is suitable for industrialized production.

The invention aims to provide a vehicle-mounted solar charging pile which is a combination of novel solar photovoltaic power generation and a charging pile, and solves the problems that an existing electric vehicle charging pile can only utilize alternating current and direct current power grids at fixed places to carry out charging and fails to fundamentally solve the problems of energy regeneration and environment pollution; in addition, the vehicle-mounted solar charging pile can provide emergency energy to an electric vehicle or other electric vehicles in a no-service-area region. According to the invention, the electric power of a solar cell is supplied to a storage battery by means of an intelligent controller, a direct current is utilized or the direct current is inverted into an alternating current to cooperate with the charging pile so as to charge the electric vehicle. A system cooperatively control maximum power tracking of the solar cell and intelligent charging of the storage battery, so that the photovoltaic charging pile is enabled to stably charge the electric vehicle, and the optimal utilization of solar energy is also realized.

A method for controlling an engine in a hybrid electric vehicle according to the present disclosure includes, in response to a drive motor being unavailable, commanding an engine power equal to the lesser of a first and a second power. The first power is sufficient to satisfy a driver wheel torque request at the current engine speed, and the second power corresponds to a maximum engine torque available at a target engine speed, where the target engine speed is selected to attain a desired battery state of charge.

The invention discloses an electric vehicle remainder range detection method and device and a vehicle with the electric vehicle remainder range detection device. The method includes: judging whether the vehicle enters a preset working condition or not; if so, acquiring the previous-moment remainder range of the vehicle; correcting the current remainder range of the vehicle according to the currentvehicle speed and the previous-moment remainder range of the vehicle so as to lower the jump value of the remainder range. The method has the advantages that the method can correct the remainder range of the vehicle when the vehicle changes working conditions, so that the jump of the remainder range is avoided effectively, user experience is improved effectively, and the method is simple and easyto implement.

The invention discloses an electric vehicle air conditioner evaporator icing test method. The electric vehicle air conditioner evaporator icing test method comprises the steps that firstly, a test instrument is arranged, and then a vehicle is tested; in the test process, a test environment state, a vehicle air conditioner state and a vehicle speed state are reasonably set; and finally, test valuesof each test point are analyzed and compared under different environmental working conditions, and then whether an icing test of an electric vehicle air conditioner evaporator passes or not can be analyzed. The test method fills in the blank of the icing test of an electric vehicle air conditioner evaporator, and through the test method, the operation procedure of the icing test of the electric vehicle air conditioner evaporator can be standardized, whether the evaporator icing problem of the vehicle is prone to being caused or not can be timely found in the design stage, so that early-stagedesign risk is effectively avoided, and customer complaints are reduced.

The invention discloses a charging method and device for electric vehicles. The method comprises the steps of: acquiring operation data of the electric vehicles; according to the operation data of theelectric vehicles, carrying out clustering on the electric vehicles to obtain a plurality of electric vehicle groups; and according to operation data of a cluster center in each electric vehicle group, preset time segments and charging resource data of each time period, acquiring charging parameters corresponding to each electric vehicle group, wherein the charging parameters comprise charging power and a charging time period. The invention solves the technical problem of intensifying a load peak and valley difference, which is caused by a case that in the prior art, an electric vehicle is charged in a load peak period of a power grid.

The invention discloses a structure for a motor of an electric vehicle. The structure comprises a shaft, a driving plate, a shell, a stator core coil winding, a bracket plate and a rotor, wherein the driving plate is fixedly sleeved on the shaft end of peripheral; one end of the shell is dynamic hermetically and rotatably sleeved on the periphery on one end of the shaft; the rotor is fixedly sleeved on the shaft; the stator core coil winding is located inside the inner circumference of the rotor; the stator core coil winding is fixedly arranged on the bracket plate; the inner side of the bracket plate along the circumference direction is dynamic hermetically and rotatably sleeved on the shaft; one end of the bracket plate on the outer side along the circumference direction is hermetically and fixedly connected with the other end of the shell; a circular sealing space is formed by the shaft, the bracket plate and the shell; and the rotor and the stator core coil winding are both located in the circular sealing space. The structure for the motor of the electric vehicle is high in continuous stability, the bracket plate is in direct contact with atmosphere, the heat generated by the stator core coil winding is directly emitted to the atmosphere and the radiating speed is high, so that the temperature of the stator core coil winding can be quickly reduced, the power loss of the motor is reduced and the efficiency of the motor is increased.

The invention discloses an electric automobile battery pack fixing device. The electric automobile battery pack fixing device comprises a shell and a supporting plate arranged in the shell and used for supporting a battery pack, wherein a clamping mechanism capable of movably clamping and positioning the battery pack is arranged in the shell, the clamping mechanism comprises a pair of inner clamping plates oppositely arranged and used for positioning the battery pack, an outer clamping plate is arranged on the outer side of each inner clamping plate, a vibration reducing positioning mechanismis arranged between the inner clamping plates and the outer clamping plates, and a driving structure for driving the pair of outer clamping plates to move relatively is arranged in the shell. The battery pack can be quickly and effectively fixed and released, the operation is simple, and the battery pack replacement efficiency can be effectively improved, so that the problem of poor cruising ability of an electric vehicle is effectively solved, meanwhile, the vibration reducing positioning mechanism plays a better role in buffer and vibration reduction on the battery pack, so that the batterypack is well protected, and the service life of the battery pack is prolonged.

The invention discloses a battery temperature difference self-adaption threshold value determining method and system. The method comprises the steps of dividing a vehicle state into a charging state, an operation state and a standing state according to the data uploaded by an electric vehicle, calculating the time interval between the first data uploading time of the vehicle and the current time, and if the time interval is less than or equal to three months, determining that the temperature difference threshold value is a threshold value specified by an enterprise when the vehicle leaves a factory, if the time interval is longer than three months, extracting the temperature of the power battery according to different vehicle states, and constructing a power battery temperature database in charging, operation and standing states, extracting temperature difference values to construct a power battery temperature difference database, and determining the window length of the sliding window based on temperature difference threshold stability, and determining temperature difference threshold values in different states according to the window length of the sliding window based on the Pauta criterion. The invention also provides a battery temperature difference self-adaption threshold value determining system. The threshold value is determined for the power battery temperature difference based on different states of the vehicle, and the driving safety is improved.