1096 results about "Power performance" patented technology

Various arrangements for controlling a head-mounted display of an augmented reality display are presented. A head-mounted display may be provided and may be configured to present a virtual field of view comprising a virtual object superimposed on a real-world scene. A controller may be provided and configured to modify display of the virtual object by the head-mounted display based on a first color of a real-world object in the real-world scene. The virtual object in the virtual field of view may be superimposed over the real-world object. A lumen output of the head-mounted display for displaying the virtual object may be decreased.

In some embodiments, a method and apparatus for power performance monitors for low-power program tuning are described. In one embodiment, the method includes the computation of power consumption levels of instructions of an application. Once consumption levels are computed, instruction sequences of the application are identified that exhibit an excess power consumption level. For the identified instruction sequences, the application program is recompiled to reduce power consumption levels of one or more of the identified instruction sequences. Other embodiments are described and claimed.

A system and method for controlling power and performance in a microprocessor system includes a monitoring and control system integrated into a microprocessor system. The monitoring and control system includes a hierarchical architecture having a plurality of layers. Each layer in the hierarchal architecture is responsive to commands from a higher level, and the commands provide instructions on operations and power distribution, such that the higher levels provide modes of operation and budgets to lower levels and the lower levels provide feedback to the higher levels to control and manage power usage in the microprocessor system both globally and locally.

A plural-data transmission Start message is transmitted prior to transmission of plural data to an intermittent operation type wireless communications terminal, and when transmission of plural data is completed, a plural-data transmission End message is transmitted. The terminal which received the plural-data transmission Start message can change over the sleep period of the aforesaid intermittent operation to a shorter sleep period. Thereby, an improvement in the response performance in the case of plural-data delivery can be simultaneously obtained while maintaining the low power performance of a sensor node.

The invention discloses a power system of a mixed power automobile and a control method thereof. The power system comprises a rear electric motor drive system, an integrated type starting generator drive system, a power supply system and a control system; the rear electric motor drive system comprises a rear electric motor, a speed reducer, a differential and a rear electric motor controller and separately drives rear wheels; the integrated starting generator drive system comprises an engine, a front electric motor, a gear box, a front differential and a front electric motor controller; as the nose cabin power assembly, the power system can work under the integrated starting generator drive mode, the pure electric drive mode, the regenerative braking mode or the four-wheel drive mode. The invention omits the middle drive device in a traditional four-wheel drive vehicle, has higher drive flexibility, can reduce the automobile weight, not only can meet the requirements of a SUV vehicle for the complete-vehicle power performance, trafficability characteristic and the like, but also can achieve the purposes of energy saving and emission reduction.

The invention discloses a power battery device with a phase-change material cooling system, which comprises a bolt, a plurality of battery monomers, a box cover venting hole, an electrode connecting shaft, a box body top cover, a side venting hole and a frame body, wherein the battery monomers use batteries as base bodies, a shell is arranged outside the battery monomers, phase-change material is filled between the batteries and the shell and is sealed by insulating rubber; a battery box body is provided with the venting holes for radiating; the power battery device can realize that the temperature of batteries of a power device can be effectively reduced under more rugged thermal environment and can meet the requirement of the balance of temperature distribution among the battery monomers, thereby achieving the best operation condition of the power device, and prolonging the battery service life and improving the power performance of the power device. The adopted phase-change material has larger latent heat of phase-change, perfect phase-change temperature, economic and safe material, and high recycle utilization efficiency.

The invention relates to an autonomously working monitoring system (10), a method for monitoring and maintenance of power grid distributed power generation devices (14) and a related computer program product. The system comprises at least one power performance monitoring unit (12) for monitoring, analyzing and storing at least power performance data (70) of at least one power generation device (14);

• at least one power generation device (14) comprising at least one power generation module (16) for generation of electric power and at least one inverter module (18) for feeding in electric power of said power generation module (16) to a power grid (20);
• and an external network (22) connecting one or more power generation devices (14) with said power performance monitoring unit (12).

The power generation device (14) further comprises

• at least one data acquisition module (24) for measuring of power output of each power generation module (16);
• at least one inverter measuring module (26) for measuring of power output of said inverter (18) to the power grid (20);
• a data interface module (28) in power line communication with said data acquisition module (24), and in communication with said inverter measuring module (26) and said external network (22) for sending power performance data (70) of said power generation device (14) to said power performance monitoring unit (12) including power generation module ID (66) and inverter ID (68), and/or for autonomously sending a maintenance notice for requesting a maintenance action based on at least a specific power performance pattern.

This invention describes a method of building complementary logic circuits using junction field effect transistors in silicon. This invention is ideally suited for deep submicron dimensions, preferably below 65 nm. The basis of this invention is a complementary Junction Field Effect Transistor which is operated in the enhancement mode. The speed-power performance of the JFETs becomes comparable with the CMOS devices at sub-70 nanometer dimensions. However, the maximum power supply voltage for the JFETs is still limited to below the built-in potential (a diode drop). To satisfy certain applications which require interface to an external circuit driven to higher voltage levels, this invention includes the structures and methods to build CMOS devices on the same substrate as the JFET devices.

The invention discloses a lithium ion battery silicon carbide composite anode material and a preparation method thereof and aims to solve the technical problem of improving the cycling stability of a silicon carbide cathode. The lithium ion battery silicon carbide composite anode material consists of the following components in percentage by mass: 85 to 75 percent of graphite and 15 to 25 percent of silica particles, wherein the nano silica particles are dispersed on a graphite carrier to form a nuclear shell structure and are 5 to 16 mum in granularity. The preparation method comprises the following steps of: preparing a graphite dispersing agent and a silicon grinding dispersing agent; adding the silicon grinding dispersing agent into the graphite dispersing agent; and performing thermal treatment. When the method is compared with the prior art, silicon atoms are dispersed on a graphite atomic nucleus by a cation-anion charge absorption method, so that the silicon atoms can uniformly wrap the surface of the graphite, the dispersity of silicon is effectively improved in a silicon carbide composite material preparing process, the initial efficiency and the cycling stability of the silicon carbide composite anode material are improved, and a battery using the material as an anode material has relatively high safety, multiplying power performance and cycle performance.

A GaN semiconductor device with improved heat resistance of the Schottky junction electrode and excellent power performance and reliability is provided. In this semiconductor device having a Schottky gate electrode 17 which is in contact with an AlGaN electron supplying layer 14, a gate electrode 17 comprises a laminated structure wherein a first metal layer 171 formed of any of Ni, Pt and Pd, a second metal layer 172 formed of any of Mo, Pt, W, Ti, Ta, MoSi, PtSi, WSi, TiSi, TaSi, MoN, WN, TiN and TaN, and a third metal layer formed of any of Au, Cu, Al and Pt. Since the second metal layer comprises a metal material having a high melting point, it works as a barrier to the interdiffusion between the first metal layer and the third metal layer, and the deterioration of the gate characteristics caused by high temperature operation is suppressed. Since the first metal layer contacting the AlGaN electron supplying layer 14 has a high work function, the Schottky barrier is high, and superior Schottky contact is obtained.

The invention relates to a thermal management system for a pure electric vehicle, which is characterized in that it includes an electric drive system and a charger cooling circuit, a power battery cooling circuit, a power battery charging heating circuit, a passenger compartment heating circuit and a passenger compartment refrigeration circuit; The electric drive system and charger cooling circuit includes radiators, fans, kettles connected by pipelines, the electric drive system and charger cooling water pump installed in the circuit, as well as the motor controller and DCDC, as well as the charger and motor. The radiator realizes liquid-gas heat exchange to cool the heat dissipation components. Improve the environmental adaptability of electric vehicles, the power performance in high-temperature environments, the durability of key components, and the energy utilization efficiency of the entire vehicle.

The invention discloses a pure electric vehicle control unit calibration system based on CAN (controller area network) bus, which comprises an upper computer with two-way communication and a lower computer with two-way communication. The upper computer comprises a data storage module, an MAP (macro assembly program) chart optimization module, a parameter calibration module and a CAN bus communication processing module. The lower computer is a pure electric vehicle control unit (VCU) and comprises a CAN bus communication module, a data acquisition module, a calibrated data storage module and a control algorithm module. The invention further provides a pure electric VCU online calibration method based on the CAN bus. By introducing the CAN bus into the design of the electric vehicle control unit calibration system, the invention realizes online optimization of the control parameters of power, response speed, electricity consumption and the like of the pure electric vehicle, sloves the problems of difficulty in modifying the parameters, long development cycle and poor maneuverability in the prior art, and solves the problem that differences of the operating conditions and diversity of the requirements on power performance and life mileage of the vehicles under different uses, requirements to the control parameters of the vehicle control units are different due to the type variety of pure electric vehicles.

Semiconductor device circuits and methods are provided for adjusting core processor performance based on usage metrics. Metric detection and adjustment are performed in digital logic hardware guided by registers providing maximum and minimum frequency settings, without intervening input from system software or firmware, thus greatly speeding the processor performance adjustment. Power-performance drivers provide applications or the operating system ability to specify maximum and minimum frequency requirements.

Disclosed are systems, methods, and computer program products for managing power states in processors of a data processing system. In one embodiment, the invention is directed to a data processing system having dynamically configurable power-performance states (“pstates”). The data processing system includes a processor configured to operate at multiple states of frequency and voltage. The data processing system also has a power manager module configured to monitor operation of the data processing system. The data processing system further includes a pstates table having a plurality of pstate definitions, wherein each pstate definition includes a voltage value, a frequency value, and at least one unique pointer that indicates a transition from a given pstate to a different pstate. The voltage value, frequency value, and unique pointer of a given pstate definition are configurable, during operation of the data processing system, by the power manager module in response to changes in the operating parameters of the data processing system.

The present invention is drawn to a high power electrochemical energy storage device in a bipolar configuration, comprising at least n stackable cells (20) in bipolar configuration wherein subgroups of m cells are electronically monitored (63). The storage cells (20) have a lithium ion insertion anode (24) and a lithium ion insertion cathode (26), a separator (36), an electrolyte system (36), and a leak-proof seal structure (51). A number of embodiments are disclosed, characterized by a favorable range of m values, in combination with the anode-to-cathode capacity ratio, electrolyte conductivity, and other battery key features, thereby providing a high power device providing long cycle life and excellent power performance over many thousand charge and discharge cycles while minimizing the cost for electronic monitoring. Additionally, the present invention is drawn to a device combining two or more groups of stackable cells in bipolar configuration, either in series or in parallel or any combination thereof, so as to create a high power, high voltage energy storage device.

Techniques for profiling systems, such as mobile or embedded devices, are provided. The techniques can profile code executing on these systems based on power used by that code. The system may profile power usage for the entire system or a subsystem, component, or functional unit thereof, for example. The system may determine when a specified amount of power has been used, and a performance sampler may then temporarily stop execution of the code and sample state data. This sampled state data may be provided to a performance analyzer that determines performance of the executing code.

The present invention provides a torque control method for an HEV, the method comprising: detecting an operation failure of an integrated starter-generator (ISG); calculating a driver demand torque based on a current accelerator position sensor (APS); controlling the hydraulic pressure and operation of a clutch so as to increase an engine speed to convert the driving mode of the vehicle from electric vehicle (EV) mode to hybrid electric vehicle (HEV) mode in the event that an operation failure of the ISG is detected and the driver demand torque is out of a predetermined range; and compensating the driver demand torque to a desired level based on a transfer torque from the clutch to a motor. The method can improve driving performance and power performance of HEV, in the event of ISG failure, by performing a hydraulic control for a clutch and calculating a driver request torque and a transfer torque from the clutch to a motor to compensate the drive request torque to a desired level.

The invention discloses a method for testing battery peak power, which comprises the steps of: measuring and calculating a battery multiplying power charge and discharge curve and measuring and calculating maximum allowable charge and discharge currents of batteries according to the curve. The battery peak power measured and calculated by using the method has high accuracy, a database is formed by measurement and calculation according to types of the batteries and is stored in a battery management system, the database can be directly scheduled through the battery management system during use, and power of the batteries can be fully utilized on the premise that the service life of the batteries is not influenced so that power performance of a vehicle is improved.

The invention belongs to the technique fields of high molecular materials and batteries and in particularly relates to a gel polymer electrolyte as well as a preparation method and an application thereof. The gel polymer electrolyte is composed of a liquid electrolyte and a material containing natural high molecules, and has characteristics of not only higher ionic conductivity, better safety performance, better compatibility with an electrode material, better circularity and better multiplying power performance, but also better compatibility with a creature, degradability and environmental friendliness, and can be used as an electrolyte and a membrane barrier of a primary or secondary battery.

The invention discloses a nitrogen-doped graphite carbon, which is obtained by calcining a graphite carbon material in a nitrogen-containing micromolecule material or atmosphere of the nitrogen-containing micromolecule material. When a pole piece which is prepared from the nitrogen-doped graphite carbon material is used as an electrode material of the lithium ion battery, the specific capacity of the material reaches 450 to 1,100mAh/g, and the material has high multiplying power performance and cycle performance. A preparation method of the nitrogen-doped graphite carbon is convenient to operate, and is easy and practicable; the prepared material has stable and excellent performance, and is the anode material of the lithium ion battery, which has good application prospect.

The invention relates to a multimode automatic switching method for energy control strategies of an extended-range electric vehicle . The method comprises the steps as follows: 1) collecting driving condition information of the vehicle in real time, and calculating the characteristic parameters of car vehicle driving conditions in a certain time; 2) conducting matching processing to the characteristic parameters of the current condition in the step 1) and the characteristic parameters of typical conditions, and determining the type of the current driving condition; and 3) automatically selecting the optimal energy control strategy under the type of the condition according to the type of the condition in the step 2), and automatically switching the current energy control strategy into the optimal energy control strategy. Compared with the prior art, the multimode automatic switching method has the advantages of being reliable in performances, stable in whole-vehicle power performance, strong in practicability and the like.

The invention discloses a rich-lithium positive electrode material of a lithium ion battery having a coreshell structure and a preparation method of the rich-lithium positive electrode material, and belongs to the field of electrochemistry. The preparation method comprises the following steps of: calcining [NixCoyMn1-x-y](OH)2 and inorganic lithium salt in air to prepare [LiNixCoyMn1-x-y]O2, and adding the [LiNixCoyMn1-x-y]O2 into an organic acid solution to prepare a solution A; dissolving soluble manganate and soluble lithium salt into deionized water to prepare a solution B, adding the solution B into the solution A, keeping stirring to obtain gel C; and drying and pre-calcining the C, calcining the C at high temperature, taking a product out, grinding the product to obtain a ternary layered positive electrode material having the coreshell structure, wherein x is more than 0 and less than 0.5, and y is more than 0 and less than 0.5. Besides the characteristic of the ternary layered material, the material has perfect charging and discharging recycle capability under high capacitance and high potential of a rich-lithium compound; moreover, by surface cladding, the multiplying power performance of the material compared with the multiplying power performance of the non-cladded material is enhanced obviously.

The invention relates to a hybrid power unmanned aerial vehicle energy source control method based on power following, belonging to the technical field of hybrid power control of unmanned aerial vehicles. According to the hybrid power unmanned aerial vehicle energy source control method, a solar battery, a fuel battery and a lithium battery are mixed and arranged in an unmanned aerial vehicle power system to form a hybrid power system. Each energy source is controlled by comprehensively considering factors including output properties, conversion efficiency, service life, current state, flight mission profiles, needed power of electronic equipment and the like of each energy source; the self advantages can be expressed to the greatest extent under the condition that the total output power can meet the needed power of flight of the unmanned aerial vehicles and the inner electronic equipment, so that the whole hybrid power system can be at a better state and the unmanned aerial vehicles have longer unmanned aerial vehicle and better power performances.

The invention relates to a method for distinguishing working conditions and managing and controlling the energy of a plug-in hybrid electric vehicle. The method disclosed by the invention mainly comprises two parts of a method for distinguishing the working condition and a method for managing and controlling the energy. For the working condition distinguishing part, a support vector machine (SVM) model is adopted for training and studying the characteristic parameters of the working conditions so as to distinguish real-time working conditions; for the energy managing and controlling part, a fuzzy rule is formulated. Through the method for distinguishing the working conditions and managing and controlling the energy, and on the premise of ensuring power performance, the fuel economy of the vehicle can be markedly improved, and the energy conservation and emission reduction can be realized.

The invention provides a torque compensation method and system of a hybrid vehicle. The method comprises the following steps: obtaining an engine demand torque and a motor demand torque according to accelerator pedal opening and current vehicle speed of a vehicle at current; detecting an actual output torque of an engine at current; calculating a difference value between the engine demand torque and the actual output torque of the engine, and adjusting the motor demand torque according to the difference value to compensate the engine demand torque. The method provided by the invention uses the characteristics of quick motor response and high torque feedback accuracy to perform real-time compensation to the engine torque, such that the demand torque and the actual torque of the entire vehicle are consistent and the power performance of the entire vehicle is improved.

The invention discloses an energy management and control method for a plug-in four-wheel drive hybrid car. The method comprises a finished car working mode judgment method and a distribution and control method for torque in different working modes. On the basis of guaranteeing the driving performance of a finished car, the working modes of the hybrid car and working points of an engine, an ISG motor and a rear-drive motor in the different working modes are reasonably controlled. The basic energy management of the plug-in four-wheel drive hybrid car is achieved by using a concise and practical control strategy based on a logic threshold. Compared with the prior art, the energy management and control method and device have the advantages that by using the control method, on the basis of guaranteeing the power performance of the plug-in four-wheel drive hybrid car, the output torque of all power units are coordinated and controlled, so that the engine works in a low-fuel-consumption area as much as possible, and the fuel economy of the hybrid car is improved.

The invention discloses a composite power energy management prediction control system of a pure-electric vehicle. The system comprises a motor, a power storage battery and a super capacitor, wherein the power storage battery and the super capacitor are connected with a motor drive control device through a bidirectional DC-DC (direct current) converter respectively; the motor drive control device is connected with the motor; and the system also comprises a microprocessor control system and a vehicular navigation system, a switch pedal potentiometer, a brake pedal potentiometer, a motor detection unit, a power storage battery energy management system and a super capacitor energy management system connected with the microprocessor control system. The system disclosed by the invention can make full use of energy resources, improve energy recovery, increase the once-charge travel distance of the electric vehicle, protect the storage battery, prolong the service life of the storage battery and enhance the power performance of the whole electric vehicle.

The invention discloses a composite lithium-rich anode material of a lithium battery, its preparation method and its application. According to the invention, the surface modified lithium-rich material comprises a metal salt of a coating layer (M' denotes Mo, Zn, Ti, V, W) and a main phase Li[Li1-x-y-zMnxCoyNiz] O2 (0.1<=y=z<x<=2/3), wherein the mass ratio of the two is 0-50%. The preparation method comprises the following steps: dissolving the obtained Li [Li1-x-y-zMnxCoyNiz]O2 (0.1<=y=z<x<=2/3) lithium-rich material in a transition metal salt solution of 0.02-10g/L, well mixing and drying the solution under the temperature of 50 - 150 DEG C, and then calcining under the temperature of 200 DEG C - 800 DEG C for 2 - 12 hours to obtain the surface modified Li [Li1-x-y-zMnxCoyNiz]O2 (0.1<=y=z<x<=2/3) lithium ion battery anode materials. The present invention reduces initial irreversible capacity loss of the lithium-rich material, and is capable of greatly improving the multiplying power performance and the cycle performance, as well as meeting the requirement of the high-power lithium ion battery.

The present invention relates to automobile technology, and is especially one series-parallel mixed power system. The present invention features the mixed connection structure of double motor and double clutch, the secondary motor for fast start of the engine, and the motor mode or the generator mode of both the main motor and the secondary motor. The secondary motor is connected to the output of the engine, the secondary clutch is set between the secondary motor and the main motor, and the main clutch is set between the gear box and the main motor. The mixed power system is similar to available internal combustion engine automobile in structure and has simple structure, compact arrangement, low manufacture cost, optimized running, braking energy feedback, low oil consumption, less harmful exhaust, excellent power performance and high running flexibility.

The invention relates to a lithium battery composite positive electrode material with a core-shell structure and a preparing method of the lithium battery composite positive electrode material. The lithium battery composite positive electrode material comprises a core and a shell layer covering the core, the core is made of a lithium battery positive electrode material, and the shell layer is a composite conducting network layer formed by a solid electrolyte and a carbon material. The shell layer has both a good ionic conducting property and a good electron conducting property, thus regardingthe lithium battery composite positive electrode material, not only can the interface stability of the positive electrode material be improved to make the positive electrode material with high circulation stability, long service life, a good high-temperature property and high safety performance, but also the interface resistance of the positive electrode material is reduced, and the multiplying power performance of the positive electrode material is improved.