45results about How to "Avoid lifespan" patented technology

An LED illumination device includes an optical section at a front end thereof, an electrical section at a rear end thereof, and a heat dissipation section between the optical section and the electrical section. The optical section includes a plurality of LEDs electrically connecting with the electrical section, and a light output housing around the LEDs. The heat dissipation section includes a plurality of L-shaped heat pipes, a heat sink and a mounting seat. Each of the heat pipes includes an evaporation section and a condensation section substantially perpendicular thereto. The condensation sections of the heat pipes are received in the heat sink. The mounting seat attaches to the evaporation sections of the heat pipes. The LEDs thermally connect with evaporation sections via the mounting seat.

A master-slave type battery management system for accurate capacity gauge of battery packs is disclosed. It includes several battery management units linked to each other via a communication line. Each battery management unit is linked to a specified rechargeable battery set to manage the specified rechargeable battery set, detect a physical measurement data from the specified rechargeable battery set and calculates battery set capacity related value based on the physical measurement data. Each battery management unit has a unique battery ID. By assigning a battery management unit having a specified battery ID as a master battery management unit, the rest battery management units become slave battery management units. Each slave battery management unit sends the physical measurement data and battery set capacity related value to the master battery management unit via the communication line. The master battery management unit is in charge of calculating related values and transmitting them.

Disclosed herein is an overcharge protection apparatus with minimized power consumption. An overcharge protection apparatus with minimized power consumption according to an embodiment includes a switching unit for controlling supply of voltage detected in a battery cell depending on an ignition-on or off state of a vehicle, and an overcharge prevention circuit for when the battery cell is overcharged based on the voltage of the battery cell output from the switching unit, turning off a main relay, thus interrupting supply of power to a battery module, so that the voltage of the battery cell is detected only in an ignition-on state of a vehicle and power consumption is Minimized, thus preventing the lifespan of a battery from being shortened by reducing a voltage difference between cells.

The invention discloses a battery module and a battery system adopting the battery module, an electrode terminal is arranged on the end surface of a monomer battery, and a plurality of the monomer batteries are connected in series and/or in parallel through the electrode terminals, wherein the battery module further comprises a metal air duct, the metal air duct is in insulation, heat conduction and connection with the electrode terminals, and the metal air duct is used for reducing or increasing the temperature of the monomer batteries. A heat management structure adopted by the battery module and a heat management system of the battery system can effectively regulate the temperature in the battery module, avoid the inconsistencies in battery performances, and further avoid reducing the service life of the batteries or causing safety accidents.

The invention discloses a combined energy storage and discharge method for maintaining the frequency stability of a power network, which solves the problem that the energy storage capacity of a supercapacitor and a flywheel is limited and the capacity is insufficient when charging and discharging for a long time is required. The method comprises selecting a flywheel energy storage device; selecting a storage battery energy storage device; after connecting the flywheel energy storage device and the battery energy storage device in parallel to the power grid, the electric energy storage of the two energy storage devices should be kept at about 50% of their rated capacity. When the unbalanced frequency of power supply and demand decreases, that is, when the power consumption is greater than the power generation, first starting the flywheel energy storage device to discharge; If the frequency of the power grid has been balanced before the power margin exceeds 2-3 seconds, terminating thedischarge of the flywheel energy storage device; If, the grid frequency is not balanced before the flywheel energy storage device of the remaining power capacity of 2-3 seconds, , then startting the battery energy storage device discharge to ensure the continuity of the discharge for the grid frequency modulation.

A heat treating apparatus for heat treating a substrate by irradiating the substrate with light includes a heat treating chamber for receiving the substrate, a heating plate for preheating the substrate through a thermal diffuser plate, xenon flashlamps for heating the substrate preheated by the heating plate, to a treating temperature by irradiating the substrate with flashes of light, and a decompression mechanism for decompressing the heat treating chamber when the xenon flashlamps heat the substrate.

The invention provides a zero position self-learning method and system for a position sensor of a permanent magnet synchronous motor. The method comprises the steps of obtaining the maximum value of three-phase current of the permanent magnet synchronous motor, and obtaining a voltage amplitude through calculation according to the maximum value and a current reference value; distributing the voltage amplitude to obtain alpha and beta axis voltages (u<alpha>, u<beta>) required by each stage in the current period under a two-phase static coordinate system; controlling the permanent magnet synchronous motor by adopting SVPWM (space vector pulse width modulation) according to the (u<alpha>, u<beta>) required by each stage, and reading position signals output by a position sensor of the permanent magnet synchronous motor in each stage; and calculating a zero position compensation angle according to the position signals output by the position sensor in each stage. According to the zero position self-learning method, the zero position self-learning process in which the motor current can be controlled in a closed-loop mode and the current amplitude can be adjusted is achieved, the voltageamplitude does not need to be adjusted manually, the operation complexity is reduced, and meanwhile, the problems that the service life of the motor is shortened due to overcurrent and the motor cannot rotate due to too small current can be solved.

The invention belongs to the technical field of automobile batteries. The invention discloses an electric automobile battery pack with good heat dissipation performance. The battery pack comprises anouter box, a box cover, a heat dissipation inner box and a battery pack, a hinge shaft is mounted at one end of the outer box; the box cover is hinged with the outer box through the hinge shaft; the other end of the box cover is clamped with the outer box; a heat dissipation inner box is mounted in the outer box, a plurality of buffer spring columns are mounted at the bottom in the heat dissipation inner box, a mounting base is fixedly connected to the tops of the buffer spring columns, a battery pack is mounted on the mounting base, and a refrigeration water cavity, a first circulating pump and a second circulating pump are mounted in a bottom plate of the outer box. According to the invention, the outer box and the box cover are clamped and connected in a running fit manner; the mountingbase and the buffer spring columns are arranged at the inner bottom of the heat dissipation inner box, damage caused by shaking is avoided, a refrigeration piece in an inner cavity of a refrigerationwater cavity cools circulating water, the circulating water is conveyed to the inner cavity of the heat dissipation water cavity through a first circulating pump and a second circulating pump, and the heat dissipation effect is better.

The invention discloses ditching and soil loosening integrated equipment for land consolidation in the technical field of land ditching, which comprises a rubber belt, a supporting mechanism for supporting the shape of the rubber belt is arranged on the inner side of the rubber belt, and a plurality of groups of digging mechanisms for digging soil and ditching are arranged on the side wall of the rubber belt at equal intervals; each group of earth cutting mechanism comprises a plurality of direction rods which are arranged in rows at equal intervals, the direction rods are perpendicular to the outer surface of the rubber belt and are rotationally arranged on the side wall of the rubber belt, a bent digging plate is fixedly arranged on the direction rod located on the outer side of the rubber belt, and a direction synchronizing wheel is coaxially and fixedly arranged at the end head of the direction rod located at the lower end of the rubber belt; according to the chain type ditching machine, the problems that according to an existing chain type ditching machine, a fixed scraping plate is generally adopted to rotate around a chain to dig out soil under the ground, the direction of the fixed scraping plate cannot be changed, when the fixed scraping plate moves to the upper end of the ground along with the chain, the soil digging side of the digging plate faces upwards, and the soil cannot be efficiently discharged are solved; and therefore, the problem that the ditching efficiency is low is solved.

The invention discloses a track lighting device, which includes a horizontal rack fixed on the side of a vertical section A; a driving track and a supporting track are arranged opposite to each other; Mesh with the horizontal rack; the motor is set above the gear, the output shaft of the motor is connected to the center of the gear, the motor is fixed on the upper horizontal section A, and the motor can slide in the horizontal direction along the upper horizontal section A; the center position of the lower surface of the gear A housing chamber is provided; it also includes a bearing with an interference fit between the outer surface and the inner surface of the housing chamber, and a fixing post with an interference fit with the inner surface of the bearing, on which the lamp is fixed; it also includes a sliding bearing arranged on the lower horizontal section A. rod, and a sliding ring arranged on the fixed post, and the sliding ring is sleeved on the sliding rod. The invention only needs one lamp to realize the transformation of the illumination area, has low cost, low power consumption and stable light.

A grounding system suitable for urban rail transit is disclosed. The working grounding device is configured in that symmetrical working grounding points are arranged on the left side and the right side of a vehicle body, and each working grounding point is electrically connected with a switch, a carbon brush and a wheel set in sequence. The protective grounding device is configured in that symmetrical protective grounding points are arranged on the left side and the right side of a vehicle body, and each protective grounding point is electrically connected with a control switch, a power diode,a grounding carbon brush and a wheel set in sequence; and an automatic control system is used for regulating and controlling the currents of the two grounding devices, so that the currents on the twosteel rails are approximately equal. Power diodes are adopted for protection grounding, current is limited to only flow into the steel rails from a train body, damage of train rail backflow to train-mounted weak point equipment is avoided, the currents on the two steel rails are equal through an automatic control system, and the safety of a train is improved.

The invention belongs to the technical field of ethylene preparation, and particularly relates to a reaction device and process for preparing ethylene through oxidative coupling of methane. The reaction device comprises a first reaction tank, a cyclone separator, a cooler and a second reaction tank. According to the invention, methane and oxygen are introduced from a first gas inlet and a second gas inlet respectively, mixed gas blows a catalyst to rise, a reaction is carried out in the process, the solid of a gas-solid mixture enters a cooler under the action of a cyclone separator and flows through a first reaction tank to complete circulation so as to prevent the catalyst from being accumulated too thick, recycle the catalyst and avoid repeated addition of the catalyst, the separated gas enters a second reaction tank for secondary reaction so as to make the reaction more sufficient, and then the gas is exhausted through an exhaust pipe.

The invention relates to the field of machining of metal guide rails, in particular to a microwave-heating anti-fatigue device for bending an aluminum alloy guide rail. The microwave-heating anti-fatigue device comprises a workbench, a moving carrier, an automatic feeding mechanism, an electromagnetic heating mechanism and a bending mechanism, wherein the moving carrier, the automatic feeding mechanism, the electromagnetic heating mechanism and the bending mechanism are arranged on the workbench; the bending mechanism comprises a supporting frame, a bidirectional adjusting and positioning mechanism and a pressing and bending mechanism; the bidirectional adjusting and positioning mechanism comprises two positioning wheels and one bidirectional moving mechanism which is used for driving thetwo positioning wheels to move oppositely; the pressing and bending mechanism comprises an air cylinder and a movable pulley; the air cylinder is fixedly arranged on the supporting frame; an output shaft of the air cylinder is connected with the movable pulley; and the movable carrier is connected with the bending mechanism through a pull rope. The microwave-heating anti-fatigue device provided bythe invention, a to-be-bent position of a guide rail is subjected to local electromagnetic heating so that material damages caused by metal fatigue in the bending process of the guide rail are reduced; and compared with a traditional manual or cold bending way, the microwave-heating anti-fatigue device can avoid the problem that the service life of the guide rail is remarkably shortened due to metal fatigue.

The invention discloses water treatment equipment with conveniently replaceable filter bags. The water treatment equipment comprises a casing. The lower end of the casing is symmetrically welded withfour support columns; the lower end of each of the support columns is welded with a base; and the lower end of each of the bases is provided with a non-slip pattern. The upper end of the casing is provided with a sealing mechanism. A supporting mechanism is provided inside the casing. According to the invention, by means of the stabile support from the support mechanism, the stability of the filter mechanism during operation is ensured, the filtering effect is ensured, and the problem that the filter mechanism is swayed under the impact of the water flow and causing the life of the component to be shortened is avoided. All the second frame and the filter bag can be moved out of the casing at one time, so that a user can replace the filter bag externally. After the removal, the operation space becomes large, is convenient for the user to replace the filter bag, and also facilitates the user to clean the removed component.