1431 results about "Hybrid energy" patented technology

A medical device including an elongated housing having a distal end, the housing defining a lumen channel therein, an end effector disposed at the distal end, the end effector including an energy-based surgical instrument having an elongated treatment portion and a clamp arm assembly, wherein the clamp arm assembly is moveable relative to the treatment portion, at least one clip disposed within the lumen channel and a firing bar movable through the lumen channel to advance the clip from a first position within the lumen channel to a second position external of the lumen channel.

An electric storage battery system carried on a hybrid energy off-highway vehicle including wheels for supporting and moving the vehicle, an electrical power generator, and traction motors for driving the wheels, with electrical power generated on the vehicle being stored at selected times in the electric storage battery system and discharged from the electric storage battery system for transmission to the traction motors to propel the vehicle, with the vehicle and battery system being exposed to a range of environmental conditions is provided. The storage battery system includes at least one battery for storing and releasing electrical power, wherein the at least one battery generates an internal battery operating temperature that is independent of and exceeds the highest environmental temperature of the vehicle and the at least one battery.

A hybrid energy system comprised of methods that work in conjunction with multiple kinetic energy turbine types, valves, solar power panels, piezoelectric devices and also element force. Hybrid energy powers electrical devices on site and extra power is also consigned off site. A network control system shunts surplus energy to the utility grid via above ground and underground cable. An on site power system charges a parked vehicle battery. A utility service vehicle is employed to deliver charged battery banks to on and off grid customers. A hybrid energy system integrates on rooftops, skyscrapers, bridges, tunnels, and aqueducts, as well as infrastructure on and off shore. A hybrid energy system integrates in various vehicle types and the power is managed accordingly by the vehicle control system.

A system and method for improving the performance of a hybrid power supply apparatus comprising a power generating device, such as a fuel cell, and a primary energy storage device, such as a battery. The purpose of the invention is to provide an equalization charge to the battery from a source other than the fuel cell when the battery achieves a predetermined state of charge condition, thereby avoiding the need to operate the fuel cell in a low power output mode. When the predetermined state of charge condition is detected by a controller, the fuel cell is shut-down. In one aspect of the invention the equalization charge is provided to the battery by a secondary energy storage device, such as a plurality of capacitors or secondary batteries. The predetermined state of charge condition may be satisfied, for example, when the state of charge of the battery exceeds a predetermined threshold, such as 80% of the battery's storage capacity, for a predetermined period of time. In some aspects of the invention, the secondary energy storage device may also be connectable to the load. Preferably the system also includes a DC/DC converter for regulating current flow between the fuel cell and the storage devices.

A hybrid energy storage system is configured to control pulsed power. A first dynamo-electric machine is coupled to an inertial energy storage device and has multiple input stator windings configured to accept input power from a source. A polyphase output stator winding is configured to deliver electric power having a first response time to a DC bus. A secondary energy storage system is coupled to the DC bus and is configured to convert its stored energy to electric power in a bidirectional manner. A second dynamo-electric machine has an input stator winding and at least one polyphase output stator winding coupled to a converter, the converter coupled to a DC output. A polyphase boost exciter is configured to derive energy from the DC bus and excite the second machine input stator winding, wherein the second machine is configured to be excited at a faster rate than the first response time of the first machine.

A hybrid energy market and currency systems is provided to manage energy consumption in an energy market comprising a community of users. Energy currency units may be issued to users and an exchange rate between the energy currency units and a monetary currency unit may be set, providing a variable price for energy. Energy currency units may have a defined validity period, at the end of which the energy currency unit is automatically converted to monetary currency units. Users consume energy currency units through use of energy consumptive services, such as domestic consumption of electricity and hot water, and through use of transportation. Prices for energy may be set by comparing the cumulative actual and desired demand. By providing a continuous feedback mechanism, some embodiments of methods disclosed herein may raise an energy conscience—an awareness of when the community needs the help of its citizens to meet its ambitious sustainability goals.

This disclosure generally relates to stabilizing energy provided by an energy source, and more particularly to systems and methods for using multiple types of energy storage devices to selectively capture and provide energy. An energy source provides energy, and the energy storage devices selectively capture energy provided by the energy source in excess of an immediate energy requirement of a load and selectively provide energy when the immediate energy requirement of the load exceeds the energy provided by the energy source.

The invention provides a control method of a grid friendly type distributed power source based on hybrid energy storage. The method comprises the steps of optimally designing a topology structure of the distributed power source, controlling a direct current power supply system in a coordinating mode through a direct current (DC)/DC converter controlling a model normalization model, and self-adaptively controlling a grid of an alternating current (AC) side DC /AC converter. The distributed power source not only can be connected in a large grid to operate so as to reduce the influence of intermittent renewable energy power generation grid connection on the grid and provide support of voltage and frequency for the grid, but also can be connected into a micro-grid to operate as a network unit of the off-network type micro-grid to maintain stability of voltage and frequency of the off-network type micro-grid. When an outer grid breaks down, the distributed power source can realize switch between a grid mode and an island mode so as to improve power supply reliability of important loads in the system. The distributed power source improves technical performance and economic performance of the whole system through matching utilization of an energy type system and a power type energy storage system.

A hybrid energy storage system is configured to control pulsed power. A first dynamo-electric machine is coupled to an inertial energy storage device and has multiple input stator windings configured to accept input power from a source. A polyphase output stator winding is configured to deliver electric power having a first response time to a DC bus. A secondary energy storage system is coupled to the DC bus and is configured to convert its stored energy to electric power in a bidirectional manner. A second dynamo-electric machine has an input stator winding and at least one polyphase output stator winding coupled to a converter, the converter coupled to a DC output. A polyphase boost exciter is configured to derive energy from the DC bus and excite the second machine tertiary stator winding, wherein the second machine is configured to be excited at a faster rate than the first response time of the first machine.

A novel hybrid lithium-ion anode material based on coaxially coated Si shells on vertically aligned carbon nanofiber (CNF) arrays. The unique cup-stacking graphitic microstructure makes the bare vertically aligned CNF array an effective Li⁺ intercalation medium. Highly reversible Li⁺ intercalation and extraction were observed at high power rates. More importantly, the highly conductive and mechanically stable CNF core optionally supports a coaxially coated amorphous Si shell which has much higher theoretical specific capacity by forming fully lithiated alloy. Addition of surface effect dominant sites in close proximity to the intercalation medium results in a hybrid device that includes advantages of both batteries and capacitors.

The invention provides a micro-grid new energy hybrid energy storage system which comprises a new energy power generation subsystem, an energy storage carrier subsystem, a converter subsystem, a high/low-voltage power distribution subsystem and a background monitor subsystem. According to the invention, battery equalization is performed through a BMS (battery management system), a cask effect caused by non-uniformity of voltage, capacity and other parameters is avoided, and the phenomena that the capacity of the whole group is reduced and the service life of the battery is shortened due to vicious circle of performance of the battery pack are avoided. Meanwhile, a refrigeration mode of air-conditioning equipment is scientifically controlled through a heat management system, so that the battery keeps a proper, uniform and stable environment temperature in the operating process. Therefore, the service life of the storage battery is prolonged, and the operating cost is effectively reduced. A container modular energy storage scheme is adopted, the system can be designed into a miniature temporary power generation system, and the construction investment is low. The system is convenient to use and can be transported into bad condition environments such as fields for performing power generation and supply under emergency circumstances. The system can be constructed into a large energy storage power station in a centralized mode, and the capacity is conveniently expanded.

The invention discloses a hybrid energy-storage DC micro grid hierarchical control method. The DC micro grid comprises a photovoltaic power generation unit, a hybrid energy storage unit, a load unit, a networking interface unit and a DC bus, wherein each unit is connected with the DC bus respectively. By adopting the hierarchical control method, a system control layer and a current converter control layer are used for controlling the DC micro grid, the system control layer acquires networking operation mode parameters, DC bus voltage and a battery charge state to judge the current operation mode of the DC micro grid, a control mode of each unit of the DC micro grid is given, and a control instruction is sent to the current converter control layer. Each current converter can adjust the self control mode according to a different DC micro grid operation state, network voltage stability and power balance can be maintained effectively, and relative to master-slave control, excessive dependence on the master current converter is reduced; relative to a multi-agent control mode, communication is simpler; and relative to a voltage sag control mode, the network voltage is more stable and controllable.

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 hybrid energy railway vehicle system having a traction motor with a dynamic braking mode of operation for dynamically braking the traction motor and for generating dynamic braking electrical energy and an electrical energy storage system that is in electrical communication with the traction motor and that stores dynamic braking electrical energy generated by the traction motor. The system also has a hybrid energy railway vehicle with a plurality of wheels wherein the traction motor has a motoring mode of operation for driving one of the wheels in response to electrical input energy. A converter selectively provides stored electrical energy from the energy storage system to the traction motor as electrical input energy for driving one or more of wheels. The hybrid energy railway vehicle is optionally equipped computer readable medium having computer executable instructions for controlling the operation of the hybrid energy railway vehicle and a processor configured to control the operation of the railway vehicle as a function of at least one of a plurality of operating modes.

The system mainly consists of the solar energy photo-volt battery (PV) and the semi-conductor thermo electric generator module (SG). The hot end insulated heat-lead board of SG contacts with the bottom electrode of PV via the heat-lead silica gel. PV and SG connect to the power supply circuit via a lead. The hot end insulated heat-lead board of SG contacts with the radiator via the heat-lead silica gel. The energy produced by PV and the energy output by SG and boosted by a DC/DC circuit are stored respectively into the different lithium ion batteries. Via control and distribution by the consequent power circuit, these energies are converted into the DC working voltage. The invention utilizes fully the low-level heat energy and solves the problem of PV performance under hi temperature. The invention raises the generating efficiency and extends PV life.

The invention discloses an LLC resonance type three-port DC-DC converter and a control method thereof. The converter is composed of a primary side circuit, a secondary side circuit, a transformer and LLC resonant network. The primary side circuit is composed of a full-bridge unit integrating two paths of two-way buck-boost circuits connected in parallel in a staggered mode. The secondary side circuit is composed of a rectifier circuit. The transformer and LLC resonant network is composed of a high-frequency transformer, a resonant inductor Lr, an excitation inductor Lm and a resonant capacitor Cr. By adjusting the duty ratios and frequencies of power switch tubes of the primary side circuit, two-way energy transmission and output one-way energy transmission between two ports of the primary side can be effectively controlled at the same time. According to the converter and the method, a non-isolation type two-way buck-boost converter is integrated with an isolation type full-bridge LLC resonant converter, so that multiplexing of the primary side switch tubes is achieved, the number of the switch tubes is reduced, cost is reduced, and power density and reliability are improved. The converter is suitable for renewable energy source power generation, hybrid electric vehicles, fuel cell vehicles, hybrid energy storage systems and other systems.

The invention discloses an optimized scheduling method for a wind-solar storage hybrid system. A wind-solar output power reference value is set and day-ahead prediction output curves and load prediction curves of wind power and photovoltaic energy are obtained; a wind-solar storage energy output curve as well as an operation mode of an energy storage device are determined; a multi-objective optimization scheduling model is established by taking intra-day operation cost minimization of system scheduling as an optimization objective; and then an input load prediction curve, a wind-solar storageenergy output curve and the operation mode of the energy storage device are inputted, and the optimization scheduling model is calculated by using an improved particle swarm optimization algorithm toobtain a day-ahead set combination output curve. According to the invention, with utilization of the complementary characteristic and frequency modulation capability of the wind-solar energy, the frequency regulation pressures of the energy storage device and the conventional energy set are reduced; and with consideration of the frequency safety constraint, the optimal operation mode of the wind-solar storage hybrid energy system is determined, so that the economic and security of the operation of the hybrid energy system are improved.

The invention discloses a power adjustment method for a hybrid energy storage photovoltaic power station. In the operating process of the photovoltaic power station, voltage of a direct current bus of the photovoltaic power station and voltages of a super capacitor group and a lithium battery group which are connected with the direct current bus respectively through two bidirectional direct current/direct current (DC/DC) controllers are detected in real time, active power output of a photovoltaic power supply is detected in real time, and meanwhile power output values of the super capacitor group and the lithium battery group for fulfilling an electric energy quality adjustment and control aim of the photovoltaic power station or finishing a scheduling task are quickly calculated; and running states of the two bidirectional DC/DC controllers are controlled according to a calculation result, and thus a charging process and a discharging process of the super capacitor group and the lithium battery group can be controlled. By the method, the advantage of high energy density of a lithium battery and the advantages of long circulation service life and high power density of a super capacitor are given a full play, the problems of low electric energy quality and difficulty in participation in power grid scheduling which are caused by grid-connected running of the photovoltaic power station can be solved; and popularization and application of the photovoltaic power station are facilitated.