264results about How to "Avoid excessive discharge" patented technology

The method of controlling rechargeable battery power is a method that includes limiting the amount of usable power during rechargeable battery charging and discharging, determining a rechargeable battery current-voltage characteristic function based on rechargeable battery charging and discharging current flow and voltage, finding a limiting discharging current I_max and/or a limiting charging current I_min from a prescribed minimum voltage V_min to prevent over-discharging and/or a prescribed maximum voltage V_max to prevent over-charging and their intersection with the current-voltage characteristic function, and controlling current such that discharging current greater than or equal to I_max and/or charging current less than or equal to I_min does not flow through the rechargeable batteries. In this fashion, the amount of usable power can be limited considering factors such as the memory effect, and the rechargeable battery can be used to its maximum capability within the range of safe operation.

A battery pack for a power tool has a less-current consuming over-discharge protection. The battery pack includes a battery stack composed of a plurality of series connected secondary cells, and a discharge detector configured to monitor a cell voltage across each of the secondary cells and to provide a discharge stop signal when any one of the cell voltages becomes lower than a predetermined threshold. The discharge stop signal is fed to deenergize the power tool. The discharge detector is composed of a voltage monitor and a power controller. The voltage monitor includes a plurality of comparators and a plurality of constant voltage elements each providing a constant voltage determining the threshold. Each comparator is configured to compare each cell voltage with the threshold to give a comparison result. The voltage monitor is energized by the battery stack to provide the discharge stop signal based upon the comparison results. The power controller is configured to energize the voltage monitor when the battery pack is connected to the power tool. Thus, the discharge detector is protected from consuming the energy of the battery pack while being disconnected from the power tool.

An apparatus and method are provided for treating wound with negative pressure. The apparatus includes a wound cover, a first pump for providing said negative pressure at a chosen pressure level to the wound, a canister, a first conduit between the wound cover and the canister, first means for measuring the pressure within the canister, and a second conduit which connects the canister with the first pump. A circulating pump is arranged to intermittently transport a gas volume from the canister to the wound region via a third conduit and back to the canister via the first conduit in order to press out possible exudates from the first conduit to the canister. A second means analyzes the pressure curve over time of said pressure in the canister and a third means indicates by alarm when said pressure curve differs from a normal cyclical form.

A remote climate control system is for an electric vehicle without a combustion engine and having a rechargeable electrical power source and an electrical Ventilation blower selectively powered thereby, a sensor associated with the rechargeable electrical power source, and a data communications bus extending throughout the hybrid vehicle. At least one of the electrical Ventilation blower and the sensor is coupled to the data communications bus. The remote climate control system includes a remote transmitter and a receiver to be positioned at the hybrid vehicle for receiving signals from said remote transmitter. A vehicle remote climate controller cooperates with said receiver and to be coupled to the data communications bus extending within the hybrid vehicle for communication thereover to selectively operate the electrical Ventilation blower responsive to the sensor and said remote transmitter.

The invention relates to an electrical design field and discloses a power battery management system and a method thereof. Estimation algorithm of cell state of charge (SOC), a heat management technology, a safety management and other new technologies are researched and implemented. The system in the invention comprises a safety management subsystem, a heat management subsystem, an optimization subsystem and the like. The safety management subsystem is used for monitoring charged states of cell monomers; determining whether the cell monomers are in discharge end states according to charged states of cell monomers and terminating cell discharges if the cell monomers are in discharge end states. The heat management subsystem is used for detecting temperatures of cell monomer surfaces; determining upper limits of temperature ranges in cell monomers according to temperature history information of cell monomer surfaces; determining temperature distribution information of a cell box consisting of all cell monomers; controlling an operating temperature of the battery according to temperature distribution information so that the operating temperature is in a range of preset temperatures. The optimization subsystem is respectively connected with the safety management subsystem and the heat management subsystem, and is used for controlling working states of the safety management subsystem and the heat management subsystem. In the invention, the safety management, the heat management and the like are applied in a management field of a power battery, which can improve safety performance, prolong service life, raise usage efficiency, give fully play to cell potential and guarantee the safety of using.

A hybrid construction machine according to the present invention is constructed to drive electric motors (6, 7, 13, 15, 23, 25) by means of power of a power generator (11) to be driven by an engine (10), power of an auxiliary battery (42) and power of a main battery (12) charged with power of the power generator (11). The hybrid construction machine has a switch (43) for switching to drive the electric motors (6, 7, 13, 15, 23, 25) by means of power of at least one of the power generator (11) and the main battery (12) when operating normally and to drive the electric motors (6, 7, 13, 15, 23, 25) by means of power of the auxiliary battery (42) when operating emergency such that the electric motors (6, 7, 13, 15, 23, 25) can not be driven by means of the normal power.

The invention relates to a vehicle-bone intelligent power management system used for CAN bus technology vehicles, belonging to the technical field of electronic vehicle control. The system includes a current and voltage monitoring device, a temperature monitoring device, an n route intelligent relay, an m route restorable fuse, a digital electric converting device and a CAN/LIN gateway; wherein, the input end of the current and voltage monitoring device is directly connected to the anode of a storage cell; the output end of the power electric signal of the current and voltage monitoring device is respectively connected to the input ends of the m route restorable fuse, the n route intelligent relay and the digital electric converting device; the temperature monitoring device is arranged at the proper position of the storage cell; the output end of the communication signals of the current and voltage monitoring device, the temperature monitoring device and the intelligent relay are connected with the CAN/LIN gateway by an LIN bus; the CAN/LIN gateway and the digital electric converting device are directly connected with the CAN bus of the body of the vehicle. The system realizes the on-off control of the power electricity of the vehicle by adopting a digital signal, monitors the sate of the storage cell of the vehicle, prevents the storage cell from over-discharging and reduces the static power consumption of the storage cell.

A development apparatus according to an embodiment comprises a development tank which accommodates developer containing toner and carrier, an agitating screw which agitates and transports the developer in the development tank, and a development roller which is provided close to or in contact with a photosensitive body and visualizes an electrostatic latent image on the photosensitive body. The toner and the carrier are externally replenished to the development tank, and excess developer in the development tank is discharged through a developer discharge outlet to outside of the development container. In the development container, the development apparatus further comprises a flow regulating member for regulating a flow of the developer. The flow regulating member is provided facing the developer discharge outlet and extending vertically upward with respect to a bottom plane of the development tank.

An ice making machine having a main body and an auxiliary table which is separable from the main body, wherein the main body of the ice making machine comprises a freezing unit for making ice pieces by freezing water separated into discrete cells; a cooling system connected to the freezing unit; an ice bin for storing ice pieces made by the freezing unit; a first water supply pipe for supplying water to the freezing unit; and a first drain pipe for discharging water remaining unfrozen in the freezing unit. The auxiliary table comprises a feed water receptacle and a drain receptacle, both having a space for containing a predetermined level of water; a second water supply pipe selectively connected to the first water supply pipe to supply water contained in the feed water receptacle to the freezing unit; and a second drain pipe selectively connected to the first drain pipe to direct water discharged from the freezing unit to flow to the drain receptacle. The first water supply pipe and first drain pipe of the main body can be selectively and respectively connected to an external water line for supplying water and an external drainage for discharging water remaining unfrozen in the freezing unit.

A power supply apparatus and a power supply method are described, wherein the non-polar characteristics of the electrodes of a capacitor is utilized to improve the energy utilization efficiency of a battery through reciprocating switches of polarity connection between the battery and the capacitor. The voltages of the capacitors can also stay at a near constant level using the polarity reversal mechanism.

The invention relates to electrochemical devices comprising complexes of cobalt comprising at least one ligand with a 5- or six membered, N-containing heteroring. The complex are useful as p- and n-dopants, as over of electrochemical devices, in particular in organic semiconductors. The complexes are further useful as over-discharge prevention and overvoltage protection agents.

Battery information output equipment allows a driver of an electric vehicle 10 of an electricity consumer 2, now parked, to input what battery capacity is required at two or more points of time on or before the time at which the electric vehicle is scheduled to come into use, considering an operation schedule for the vehicle, and transmits the usable capacity at each point of the times, i.e., maximum capacity minus capacity required at each point of the times, to a power supply/demand management center 3, so that charge and discharge of a battery 17 is controlled by a charge/discharge command from the power supply/demand management center 3 such that use of battery capacity for power supply and demand leveling is kept within the usable capacity at any point of the times.

An electromagnetic energy supply system for supplying electromagnetic energy signals to an applicator for applying the electromagnetic energy signals to tissue for heating such tissue can supply electromagnetic energy signals of at least one selected frequency of a plurality of frequencies available for selection. The system includes a plurality of individual electromagnetic signal generators each adapted to generate signals of a particular frequency, such as two microwave energy signal generators with one operating at 915 MHz and one operating at 1450 MHz. A system controller coordinates operation of the generators. Each generator is connected to connectors for connecting an applicator or array of applicators for applying the selected frequency electromagnetic energy signals to the tissue to be heated. A power splitting circuit can provide multiple connectors tuned for one or for more than one applicator to be connected. The system can provide a treatment using a single selected frequency, a plurality of selected frequencies simultaneously, or can switch between selected frequencies.

An on-board battery supervisor that monitors the state-of-charge (SOC) of a lead-acid vehicle battery and automatically disconnects loads from the battery to prevent over-discharging of the battery, is disclosed. As the battery is being discharged, the on-board battery supervisor disconnects loads at an SOC level that leaves enough energy in the battery to reliably start the vehicle engine, while providing as much energy as possible to accessory loads. The loads are automatically reconnected as the battery is charged. Some preferred embodiments of the invention are designed specifically for use in watercraft and a dual output version of the invention simplifies the electrical system. All embodiments have circuit breaker outputs, high peak current capability, a low quiescent current drain and a dual timer that allows accurate determination of the SOC of the battery.

A low reflective window structure in an existent electro-absorption optical modulator involves a trading off problem between the increase in the parasitic capacitance and the pile-up. This is because the capacitance density of the pn junction in the window structure is higher compared with the pin junction as the optical absorption region, and the application of electric field to the optical absorption region becomes insufficient in a case of receding the electrode structure from the junction between the optical absorption region and the window structure making it difficult to discharge photo-carriers generated in the optical absorption region. An undope waveguide structure comprising a structure having such compositional wavelength and a film thickness that the compositional wavelength for each of multi-layers constituting the waveguide structure is sufficiently shorter than that of the signal light and the average refractive index is about identical with that in the optical absorption region may be disposed. In a case of forming the electrode structure so as to overlap the junction boundary between the optical absorption region and the undope waveguide, and do not extend on the joined boundary between the undope waveguide and the window structure, increase in the parasitic capacitance due to the pn junction of the window structure and pile up can be suppressed simultaneously.

The power supply apparatus is directed to enable a battery to be properly controlled for charging/discharging.

A detection unit 21 detects battery voltage V, battery current I and battery ambient temperature T. A battery capacity calculation device 23 and a discharging rate calculation unit 25 estimate battery capacity and discharging rate respectively. A discharge-allowable-duration calculation unit 26 calculates discharge-allowable-duration. This discharge-allowable-duration is used for restriction the discharge-duration of the battery 6. The battery 6 is charged with the output of the generator. Charging current is restricted in accordance with upper-limit-charging-current that is calculated in an upper-limit-charging-current calculation unit 27.

The invention discloses a scheduling method for tracking a photovoltaic planned output by using a battery storage energy and a hydrogen storage energy. The scheduling method comprises the steps of making an output plan of a next day based on a short-term photovoltaic prediction power, and making different day-ahead scheduling schemes according to magnitudes and fluctuation violent degrees of prediction errors of photovoltaic powers in a sunny day and a non-sunny day; correcting a day-ahead photovoltaic planned output by using an ultrashort-term photovoltaic prediction power; and then, selecting an appropriate real-time scheduling scheme according to a state of charge of a storage battery, and calculating an actual output of a photovoltaic power generation system as well as input powers ofthe storage battery and an electrolytic bath to output to a central control unit of the photovoltaic power generation system, thereby performing real-time scheduling on each power generation electricmodule in the system. The impact on the power system is reduced, the frequency modulation pressures of water and thermal generation units are alleviated, an energy storage battery is guaranteed to work in a low-load state beneficial to prolonging the service life, the frequent change of the energy storage battery due to premature failure is prevented, and the total cost in a whole life cycle of the system is reduced.

The invention discloses a charging management system and method for tunnel cable inspection robot, which belongs to the technical field of battery charging. The system comprises a microprocessor, an electric tag reader, a servo motor controller, a remaining power detection system, a charging plug telescoping mechanism, a battery and a charging station, wherein electric tags are arranged in a tunnel, the robot can read tag information including charging station position information during the inspection process; and when the remaining power detection system judges that the robot is required to be charged, the robot automatically moves to the closest charging station according to a tag information prompt, then completes the butt-joint with the charging station under the guide of the tag content, and finally is prompted to be broken away from the charting station to carry out inspection when the remaining power detection system detects that the robot is fully charged. The system and method provided by the invention have the benefits that the robot is ensured to reach the charging station in a shorter time, and over-discharge of the battery is prevented to guarantee the service life.

A turbocharger of variable turbine geometry, comprising: a vane bearing ring assembly including a vane bearing ring and a disk which can be fixed to the vane bearing ring for creating a flow channel; and at least one support pin which is connected with a first end to the vane bearing ring and which is welded with a second end to the disk which comprises recesses for the support pin end to be welded, said recesses being surrounded by a heat throttle.