205results about "Electric power" patented technology

The present invention relates to a method for verifying a charging state of a wireless power receiving apparatus in the wireless power transmitting apparatus, and more particularly, to an apparatus and a method for efficiently performing and controlling wireless power transmission.

To this end, the present invention provides a wireless power transmitting method, wherein a standby state of determining whether at least one wireless power receiving apparatus is positioned within a wireless charge range of the wireless power transmitting apparatus and a power transfer state of transmitting power to the corresponding wireless power receiving apparatus when at least one wireless power receiving apparatus is detected in the standby state are provided, and the standby state includes a first standby state of periodically transmitting a weak detector signal and a strong detector signal and a second standby state in which at least one of a transmission period of the weak detector signal and a transmission period of the strong detector signal is different from that of the first standby state, the method including: determining any one state of the first standby state and the second standby state of the wireless power transmitting apparatus; and transmitting the weak detector signal and the strong detector signal based on the determined standby state, wherein the transmission period of the weak detector signal in the second standby state is longer than the transmission period of the weak detector signal in the first standby state.

A case battery for a personal digital assistant is provided. The case battery includes a holding portion and a charging portion. The holding portion holds the personal digital assistant detachably. The charging portion is disposed in the holding portion and configured to be electrically connected to the power input. The charging portion extends the usage time of the personal digital assistant. The charging portion includes an electrical power acceptor configured to accept electrical power from outside. The charging portion may further include a secondary battery, and the electrical power acceptor is configured to charge the secondary battery using an external electrical power source. The charging portion may include a primary battery and a receptacle configured to accept the primary battery.

A DC-based power system including: an AC power distribution system for providing AC power to a first node and a second node; a first converting system coupled to the first node that converts AC power to DC power and outputs the DC power to a first distributed bus bar; a second converting system coupled to the second node that converts AC power to DC power and outputs the DC power to a second distributed bus bar; a first set of DC/DC converters that steps down the DC power from the first distributed bus bar to a first stepped down DC voltage; a second set of DC/DC converters that steps down the DC power from the second distributed bus bar to a second stepped down DC voltage; and a critical load distribution system that is powered by both the first stepped down DC voltage and the second stepped down DC voltage.

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.

A rechargeable battery pack for a handheld power tool, encompasses a housing and at least one interface unit for establishing a mechanical and electrical connection between the rechargeable battery pack and the handheld power tool and/or a charging device. The interface unit has at least one locking element for locking the rechargeable battery pack onto the handheld power tool, and an actuation element for actuating the locking element. The actuation element encompasses at least one light-emitting element for outputting an optical signal and/or for illumination.

The invention discloses an accumulator battery online equalizing system which comprises a central processing controller, an electricity quantity acquisition module, a battery switching module, a voltage online equalizing module, an internal resistance and capacity online equalizing module and the like. The system can perform online and real-time equalizing adjusting on the voltage, the internal resistance and the capacity of a battery cell in an accumulator battery, can ensure that each battery in the accumulator battery is operated at an optimized operating state, greatly prolongs the operating life of the accumulator battery by more than two times, improves the reliability and the performance of the accumulator battery, reduces the environment pollution caused by the battery, and has good social benefit and environmental protection property; and the system adopting the active equalizing method can cancel the traditional equalizing method of periodic charging, reduces water loss of the battery, greatly reduces the probability of incontrollable low heat, prolongs the service life of the battery, simultaneously avoids the vulcanization of the battery, and saves a large amount of cost.

A rechargeable hearing aid comprises a battery charger and a hearing aid body. The battery charger presents an easily carried case, which is provided with a receiving groove and a battery chamber, which contains a dry battery for power supply. The receiving groove can receive the hearing aid body and is provided with connection terminals at two sides of the inner groove for flexibly locking the hearing aid body. A cover covers on the receiving groove and is pivotally connected to the bather charger by a hinge element, which is further connected to a switch, such that when the cover is in the position of OFF, the battery can start recharging right away, and be quickly completed with micro-voltage.

The present invention relates to an electric car which has a battery pack at a constant state of maximum power discharge and to a method of efficiently controlling a motor with due consideration for rechargeable power levels. The control method according to one embodiment of the present invention, comprises the steps of: calculating estimated power levels required, based on current power consumption levels, for providing current from the battery pack to all parts of an electric car, and the required torque according to a driver's activation of the accelerator; comparing the estimated power levels required with the maximum possible power discharge from the battery pack; and enabling maximum possible torque from the motor when the estimated power levels required exceeds the current maximum possible power discharge from the battery pack.

A system for controlling battery usage in a mobile power supply includes a controller for monitoring a state of charge of the battery and the voltage and switching off all power from the battery when the battery reaches a predetermined power off state of charge or a low voltage condition. A switch provides power to the controller in response to receipt of power from an other source, thereby causing the controller to resume monitoring of the state of charge of the battery. When the battery reaches a predetermined power off state of charge, the controller switches off power from the battery. The switch turns the controller back on in response to receipt of power from the other source. When the battery is recharged to a predetermined restart state of charge and when the voltage reaches a restart voltage, power from the battery is switched back on.

The purpose of the present invention is to provide a method and device for operating a power system, and a rechargeable-battery management device, that extract maximum performance from rechargeable batteries and use said batteries evenly while taking into consideration cost and the operation of the batteries. In order to solve said problem, in this method for operating a power system provided with a plurality of rechargeable-battery devices and a plurality of electric generators, the amount of power that a rechargeable battery available during a scheduled time period on a scheduled date will be able to supply is determined, an economic-dispatch calculation including the determined amount of power that the aforementioned rechargeable battery will be able to supply is performed for the power system, and said rechargeable battery is used to supply power during the scheduled time period on the scheduled date.

A contactless power-receiving device, which is connected to equipment via a connection terminal and which supplies power to the load for the equipment, provided with: a secondary coil which intersects the alternating magnetic flux generated from a primary coil to which an alternating power is supplied; and a control unit which supplies induced electromotive force of the secondary coil to the load. The control unit determines the amount of charge in the load and determines whether or not to supply power to the load on the basis of the determined amount of charge.

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 an automotive active engine mount capable of energy regeneration and transmitting force perception. The automotive active engine mount consists of an active engine mount actuator body and a control circuit system, wherein the active engine mount actuator body mainly consists of rubber springs, a base, a position-fixing pin, a metal framework, an electromagnetic linear module and a piezoelectric module; the upper end and the lower end of the active engine mount actuator body are respectively connected with an engine body and an automobile frame through connecting bolts;and an actuator control system mainly consists of an energy recovery module, a controller, a storage battery voltage sensor, a controllable current source, a rotating speed sensor, a force sensor, anactuator energy regeneration voltage sensor and a relay. The invention also relates to a control method of the automotive active engine mount. The automotive active engine mount is novel in structureand high in practicability and is capable of significantly reducing the impact of engine vibration on a chassis and the automobile body, improving the ride comfort of an automobile, reducing the noise in the automobile, recovering the energy of the engine vibration, reducing the energy consumption of the automobile and achieving the purpose of improving the performance of the entire automobile while reducing the energy consumption.

The invention discloses a heating circuit of a battery. The heating circuit comprises a temperature sensor, a battery management device and a charging circuit. The temperature sensor is mounted in a battery pack; the temperature sensor detects the real-time temperature of the battery pack and sends a temperature signal. The battery management device is connected with the temperature sensor; the battery management device receives the temperature signal sent by the temperature sensor. The charging circuit is connected with the battery management device, wherein the battery management device compares the temperature signal with a critical temperature; when the temperature signal is lower than or equal to the critical temperature, the battery management device controls the charging circuit towork in a high-frequency heating mode and the charging circuit heats the battery pack; when the temperature signal is higher than the critical temperature, the battery management device controls the charging circuit to work in a charging mode and the charging circuit charges the battery pack. The heating circuit of the battery is used for realizing heating the battery through the high-frequency charging and discharging to the battery by utilizing the properties that the battery is high in internal resistance at a low temperature and generates much heat, and the influence cannot be generated tothe safety of the battery by high-frequency alternating-current charging and heating.

The invention relates to an electric vehicle charging station dispatching system and an ordered charging control method. On the basis of comprehensively considering the maximum charging power of ordered charging piles with adjustable charging power in a charging station and the target electricity utilization power issued by a superior scheduling system, the total target electricity utilization power issued by the superior dispatching system is distributed between the ordered charging piles, so that a value of the charging power of the ordered charging piles is between the minimum charging power and the maximum charging power, and the charging power of the charging piles in the charging station is comprehensively managed. Through the ordered charging control method, formulation of power sharing can be realized, so that transition of the charging behavior of the electric vehicles is guided from a one-way disordered random charging mode to an ordered charging mode, peak-sifting charging is achieved, power grid load fluctuations are reduced, energy losses of a power grid is reduced, and the reliability and economic benefits of a power distribution network are improved.

A desk storage device includes a housing including an accommodation chamber, a front cover panel for controlling access to the accommodation chamber and a plurality of partition boards adjustably mounted in the accommodation chambers at selected elevations and defining an insertion slot between each two adjacent partition boards for storing one respective mobile electronic device, and a power module mounted in a bottom side in the accommodation chamber and including a control system and a system circuit board that includes electrical connectors for charging storage mobile electronic devices subject to the control of the control system and indicator lights controllable by the control system to indicate the charging status of each storage mobile electronic device.

The invention discloses a protective shell of an electronic device with a charge-discharge function. The protective shell of the electronic device with the charge-discharge function comprises a base shell, wherein the electronic device is arranged on the base shell, a circuit board and a needle head connector are arranged on the base shell, and the needle head connector is in electric connection with the circuit board or is integrated on the circuit board. The protective shell of the electronic device with the charge-discharge function is capable of directly charging the electronic device through the needle head connector, capable of charging other equipment needing to be charged through the needle head connector, and capable of further supplying power to the electronic device through a charging battery in the protective shell. Solar energy is converted into electricity through a solar charging board, so that the lithium battery in the protective shell is charged or a battery inside the electronic device is directly charged, energy is saved, the protective shell is capable of meeting the non-stop usage requirement even under the condition that charging can not be carried out through a common power source, and therefore great convenience is brought to a user.

The invention discloses a battery pack active equalization method and a battery pack active equalization device. The battery pack active equalization device is composed of an intelligent control unit, a BMS communication unit, a differential-amplification pressure difference detection unit, and an electric energy transfer unit. The BMS communication unit acquires the current value and ampere hour from a BMS. The differential-amplification pressure difference detection unit detects the voltage of batteries one by one through a differential amplifier and sends the detection values to the intelligent control unit. The electric energy transfer unit is used for transferring energy from a battery cell to a battery cell, from a battery cell to a battery module or from a battery cell to a battery pack. The intelligent control unit receives the current value and ampere hour information acquired by the BMS communication unit and the test values of the differential-amplification pressure difference detection unit, and makes operational analysis according to the received current value and ampere hour information acquired by the BMS communication unit and the test values of the differential-amplification pressure difference detection unit so as to make the electric energy transfer unit transfer the energy of battery cells. The method and the device of the invention have the characteristics of high equalization efficiency, accurate equalization current flow and high cost performance.

A wireless power transmitter includes a sensor configured to sense an object, a power transmitter configured to wirelessly transmit power to a wireless power receiver, and a controller configured to determine whether the object is the wireless power receiver, and control the power transmitter to wirelessly transmit power to the wireless power receiver upon the object being determined to be the wireless power receiver, wherein the sensor and the power transmitter comprise separate coils.

The invention provides a storage transfer robot group with an automatic charging function and a wireless automatic charging method thereof. The method adopts a wireless charging mode and realizes automatic deploying and charging of a plurality of storage transfer robots via a charging pile; the realization of wireless autonomous charging is effectively helpful for the storage transfer robot groupwith the automatic charging function to get rid of the limitation of working time and improves the transportation efficiency of logistics and freight transportation; the use of the storage transfer robot group with the automatic charging function is beneficial to reducing the cost of logistics sorting and transportation, reducing the input of personnel, improving logistics management, reducing theprobability of cargo transfer damage, improving the sorting efficiency of the modern logistics and promoting the development of the logistics industry. In addition, the storage transfer robot can beapplied to other fields including a material processing field, a hotel transfer field, and a military and hazardous field.

The invention discloses a city lane realizing charging during driving of an electric automobile. The city lane comprises an electric automobile wireless charging electric energy emission system and a lane pavement (3). The electric energy emission system comprises a DC source, an AC source, an emission circuit, a wireless electric energy emitter (2) and a driving battery (5). The DC source, the AC source, the emission circuit, the wireless electric energy emitter (2) and the driving battery (5) are successively connected in series, the surface of the upper portion of the lane pavement (3) is in contact with electric automobile driving wheels, the wireless electric energy emitter (2) is fixed below the lane pavement (3), the input anode of the driving battery (5) is connected with the anode of a wireless electric energy receiver (4), and the input cathode of the driving battery (5) is connected with the cathode of the wireless electric energy receiver (4). The city lane provided by the invention makes up for the disadvantage of wired charging of an electric automobile in the prior art.

An electric power generation system employs a thermoelectric generator placed between an aircraft inner skin and an aircraft outer skin. The thermoelectric generator is configured to utilize a thermal differential between the inner and outer skin to generate an electric current. An electrical interface is provided for access to the electric current generated by said thermoelectric generator.

The invention provides an electric automobile multi-function vehicle-mounted charging circuit. The electric automobile multi-function vehicle-mounted charging circuit comprises an input filtering circuit, a three-phase rectification bridge, a Buck/Boost circuit, a stator winding of a three-phase motor of an electric automobile, and a three-phase bridge type inversion circuit which are successively connected. The output end of the Buck/Boost circuit is connected with a central point of one of the legs of the three-phase bridge type inversion circuit. The Buck/Boost circuit and the three-phase bridge type inversion circuit are used for receiving driving signals for changing working state of itself so as to control the vehicle-mounted charging circuit to be at a vehicle-mounted charging mode, a portable AC power mode or a motor driving inversion mode. The electric automobile multi-function vehicle-mounted charging circuit realizes integration of three functions, i.e., vehicular-mounted charging of the electric automobile, a portable AC power source and motor driving inversion, so that the size, weight and cost of the electric automobile in realizing the above three functions are reduced, and at the same time large-power vehicular-mounted charging can be realized.