41results about How to "Optimize state of charge" patented technology

The portable solar energy system stores electrical energy generated by a solar panel, which is made of an array of photovoltaic cells, in a dc storage battery, and upon demand converts the dc voltage of the battery to an ac output suitable for supplying conventional electrical appliances. The battery is a sealed lead-acid type and may be an Absorbed Glass Mat (AGM) battery. The system includes an energy storage and converting unit, which houses the battery and a dc-to-ac inverter. The inverter converts the stored energy of the battery, supplied at a low dc voltage, into the ac voltage and current required for supplying conventional appliances. A charge controller manages the flow of current from the solar panel to optimize the state of charge of the battery and to maximize the useful life of the battery. Additional circuitry monitors the discharge level of the battery to limit deep discharging.

The invention discloses a method for quickly forming a soft power lithium-ion cell. The method comprises the following steps: (S1) supplying a heat source for heating a cell by using a heating plate;(S2) driving a pressurizing plate to pressurize the cell by using a servo motor; (S3) performing gradient charging on the cell; and (S4) charging the cell till reaching high charge state. According tothe invention, a stable, compact and uniform SEI film is formed on a cathode surface, the performance of the lithium-ion cell is greatly promoted, the early failure of the lithium-ion cell in the circulating process is avoided, the yield of the cell is increased, the cell quality is optimized, the forming time of the cell is shortened, the large-scale production of the cell is realized and the method has wide application prospect.

A method for operating a vehicle hybrid propulsion system is described. During a vehicle speed control operation where a speed of the vehicle is maintained at a desired speed, in response to acceleration resulting in vehicle speed beyond the desired speed, the acceleration not caused by vehicle operator input, the torque output of an upstream and / or downstream electric energy conversion device provides brake torque to a drive wheel to decelerate the vehicle to the desired speed. The selection of the electric energy conversion device may be based on an operating condition to achieve improved control and efficiency.

The present invention provides a method for charging a NiMH battery, comprising estimating a state of charge of the battery (100), determining an end of charging time based on the estimated state of charge (200), applying a constant charging current with a rate in the range from 0.9 C to 2.1 C to the battery until a threshold voltage is reached (300), upon reaching the threshold voltage, applying a constant charging voltage substantially equal to the threshold voltage to the battery (400) and continuing applying the constant charging voltage to the battery until the end of charging time is reached (500). Furthermore, a battery charger adapted to perform such a method as well as a system comprising such a battery charger and a hearing device powered by a NiMH battery are given.

An artificial satellite is equipped with solar batteries and a non-aqueous electrolyte battery module for artificial satellite (i.e., a lithium battery). The non-aqueous electrolyte battery module is provided with a non-aqueous electrolyte battery, a temperature sensor, a charged state measurement sensor, and a computer for receiving signals output from the sensors. The managed temperature of the non-aqueous electrolyte battery in a solstice season is set so as to become equal to or lower than the managed temperature of the battery when the satellite is in the solstice season. The computer controls a temperature controller, thereby maintain the managed temperature of the battery within a given temperature range. The charged state of the lithium battery is controlled by means of turning on or off a charging switch under the control of computer. When the satellite is in the eclipse season, the managed charged state of the non-electrolyte battery is controlled so as to be a value of 50% or more. When the satellite is in the solstice season, the managed charged state of the non-aqueous electrolyte battery is controlled so as to be a value of 75% or less.

An indirectly heated button cathode for use in the ion source of an ion implanter has a button member formed of a slug piece mounted in a collar piece. The slug piece is thermally insulated from the collar piece to enable it to operate at a higher temperature so that electron emission is enhanced and concentrated over the surface of the slug piece. The slug piece and collar piece can be both of tungsten. Instead the slug piece may be of tantalum to provide a lower thermionic work function. The resultant concentrated plasma in the ion source is effective to enhance the production of higher charge state ions, particularly P+++ for subsequent acceleration for high energy implantation.

When the sum of a first state of charge of a first battery stack and a second state of charge of a second battery stack is large, a higher state of charge is selected as a priority state of charge. When the sum of first state of charge of the first battery stack and the second state of charge of the second battery stack is small, a lower state of charge is selected as the priority state of charge. A first coefficient and a second coefficient are set in accordance with the priority state of charge. The second coefficient is set so as to be lower than the first coefficient. The product of the first coefficient and the priority state of charge is added to the product of the second coefficient and the other state of charge, to thereby calculate a state of charge of a power storage system.

A control method for achieving power transfer between stacked rechargeable battery cells and a power transfer circuit are disclosed. The power transfer circuit includes an inductor, a first switch, a second switch and a controller. A loop of the rechargeable battery cell having higher power and the inductor is conducted so that the inductor stores power until the current flowing through the inductor meets the cutoff amount. Then, a loop of the rechargeable battery cell having lower power and the inductor is conducted so that the inductor releases the power saved in the inductor to the rechargeable battery cell having lower power until current flowing through the inductor changes direction. Therefore, balance between the rechargeable battery cells can be achieved.

A method of mass spectrometry is disclosed comprising alternating between a first mode in which parent ions are analysed and a second mode in which parent ions are fragmented and their fragment ions are mass analysed. In the first mode the parent ions are charge reduced before being analysed, so as to simplify the parent ion spectral data obtained. In the second mode, the parent ions are not charge reduced prior to fragmentation, so that it remains relatively easy to induce the parent ions to fragment. The parent ions are then associated with their fragment ions using the mass spectral data obtained.

A exhaust-gas heat management system includes a catalytic converter in the exhaust-gas train of an internal-combustion engine, a cover enclosing the catalytic converter, and thereby realizing a cavity for holding a latent-heat storage PCM, at least two fluid connections between the cavity and the collecting vessel, and a pump device for activating and deactivating a PCM circuit between the cavity and the collecting vessel by means of the fluid connections. A method comprises determining an operating state of the internal combustion engine, determining the catalytic converter temperature, determining the PCM temperature, activating the PCM circuit if the PCM temperature is above a phase transition temperature of the PCM, and the internal combustion engine is in a switched-on operating state or the internal combustion engine is in a switched-off operating state and the catalytic converter temperature is below a light-off temperature of the catalytic converter.

The present invention provides an OMC (Ordered Mesoporous Carbon)-based composite electrode and a lead-acid battery. The OMC-based composite electrode comprises a negative plate grid and lead plasterof an OMC / sponge Pb composite structure material, wherein the lead plaster of the OMC / sponge Pb composite structure material coats the negative plate grid, and the OMC-based composite negative electrode is prepared after solidification and drying. The OMC-based composite negative electrode is prepared by coating lead plaster of the OMC / sponge Pb composite structure material on the negative plate grid for curing and drying. The OMC-based composite electrode and the lead-acid battery are favorable for improving the specific capacity and the service life of the lead-acid battery. The technology of the traditional lead-acid battery negative electrode and the technology of the super capacitor are fused, so that the energy advantage of the battery characteristic is achieved, and the instant power high-capacity charging characteristic of the double electric layer capacitor is achieved, so that the specific capacity and the service life of the traditional lead-acid battery are improved.

The invention provides an optical storage system optimization control method based on Kalman filtering and model predictive control and belongs to the technical field of power system optical storage control. The method comprises the steps of: establishing a structural model of an optical storage combined power generation system; establishing, by using an improved Kalman filtering algorithm, the time equation and the state equation of a filter; establishing a mathematical model of the optical storage combined power generation system; performing optimization control on the energy storage systemby using a model predictive control method; combining the Kalman filtering algorithm with the predictive control method to form double-adjustment feedback optimization control, and achieving the closed-loop control of the optical storage combined power generation system by an energy storage state of charge parameter. The method fully utilizes the prediction characteristics of the Kalman filteringand the model predictive control, and predicts and timely controls the optical storage combined system so as to optimize the energy storage system output and the energy storage system state of chargewhile ensuring the stable output power of a photovoltaic power generation system.

The embodiment of the invention relates to a battery health state obtaining method and device and a storage medium, wherein the method comprises the steps: judging whether a capacity variation calculation condition is met or not when a vehicle is powered on; when it is judged that the capacity variation calculation condition is met, calculating the capacity variation; judging whether a capacity calculation condition is met or not; when it is judged that the capacity calculation condition is met, calculating the capacity; and calculating the health state of the battery according to the capacity variation and the capacity. By means of the method and device and the storage medium, the corresponding relation between the cycle number of the whole life cycle of the battery and the SOH does not need to be measured, and test resources and time are saved; the actual capacity aging degree of the battery is reflected more truly, the estimation accuracy of the state of charge and the driving range is improved, and good driving experience is provided for a user.

The invention discloses a storage battery charging method and device. The method includes using preset maximum charging current as initial current to perform charging; sampling charging current in real time; judging the magnitude of current of a current moment and a preset minimum charging current; if the current of the current moment is smaller than the minimum charging current, assigning the minimum charging current to the current of the current moment and continuing to sample; if the current of the current moment is larger than or equal to the minimum charging current, sampling voltage of the current moment, and calculating current of a next moment based on a storage battery model capable of dynamically correcting voltage; judging the magnitude of the current of the next moment and the maximum charging current; if the current of the next moment is larger than the maximum charging current, assigning the maximum charging current to the current of the next moment and continuing to sample; and if the current of the next moment is smaller than or equal to the maximum charging current, updating an energy storage capacitor, electromotive force and internal resistance and continuing to sample. Based on the storage battery model capable of dynamically correcting voltage, the storage battery charging method provided by the invention corrects storage battery parameters in real time, so as to rapidly and accurately charge.

A method for charging a rechargeable battery (3) of an electric device in different charging steps applying different charging currents is described, said charging steps comprising at least:a first charging step applying a first constant charging current (I1) to the battery (3) while the battery voltage is smaller than a first voltage threshold (V1) and / or while the battery temperature is smaller than a first temperature threshold, said first charging (I1) current being smaller than a second charging current (2);a second charging step applying said second constant charging current (2) to the battery (3) while the battery voltage is higher than said first battery voltage threshold (V1) and lower than a second battery voltage threshold (V2) and / or while the battery temperature is higher than said first temperature threshold and smaller than a second temperature threshold;a third charging step applying a constant charging current (I3) to the battery (3), wherein said third constant charging current (I3) is switched on every time when the battery voltage drops to a fourth voltage threshold (V4) and switched off when the battery voltage reaches a fifth voltage threshold (V5), and wherein said third charging step providing said repeated switching on and off the third constant charging current (I3) thereby producing current pulses ends if the length of a current pause (Toff) following said current pulse (Ton) equals or exceeds the length of p·(k−1)−times the preceding current pulse (Ton) with k being the ratio of constant charging current 13 and the constant charging current I1 and p being a defined factor.

A method for charging a rechargeable battery (3) of an electric device in different charging steps applying different charging currents is described, said charging steps comprising at least:a first charging step applying a first constant charging current (I1) to the battery (3) while the battery voltage is smaller than a first voltage threshold (V1) and / or while the battery temperature is smaller than a first temperature threshold, said first charging (I1) current being smaller than a second charging current (I2);a second charging step applying said second constant charging current (I2) to the battery (3) while the battery voltage is higher than said first battery voltage threshold (V1) and lower than a second battery voltage threshold (V2) and / or while the battery temperature is higher than said first temperature threshold and smaller than a second temperature threshold;a third charging step applying a constant charging current (I3) to the battery (3), wherein said third constant charging current (I3) is switched on every time when the battery voltage drops to a fourth voltage threshold (V4) and switched off when the battery voltage reaches a fifth voltage threshold (V5), and wherein said third charging step providing said repeated switching on and off the third constant charging current (I3) thereby producing current pulses ends if the length of a current pause (Toff) following said current pulse (Ton) equals or exceeds the length of p·(k−1)−times the preceding current pulse (Ton) with k being the ratio of constant charging current I3 and the constant charging current I1 and p being a defined factor.

An OMC / sponge Pb composite structure material lead plaster and a preparing method and an application thereof are provided. The preparing method comprises the following steps: performing passivation modification processing on OMC by using hydrogen peroxide, to obtain hydrophilic OMC; configuring the hydrophilic OMC into OMC dispersion liquid by using deionized water, wherein a mass ratio of the hydrophilic OMC to the deionized water is 1:2000 to 1:3500; mixing and stirring the OMC dispersion liquid and lead powder at the mass ratio of 0.1:1 to 0.11:1, to obtain a mixture; and adding sulfuric acid to the mixture, and performing mechanical agitation and mixing to prepare the OMC / sponge Pb composite structure material lead plaster. Therefore, OMC and lead powder can be mixed uniformly, and robustness of negative OMC / sponge Pb composite material pasting and a bonding capability of a polar plate and lead plaster can be ensured.

The invention provides a photovoltaic power generation plan tracking method and device for a light storage combined power generation system. The method comprises the steps of determining an output increment control instruction sequence of an energy storage system in the photovoltaic-energy storage combined power generation system based on a prediction control optimization objective function when prediction control of N forward prediction steps is adopted; generating the output power of the energy storage system at the next moment according to the obtained current output power of the energy storage system in the light storage combined power generation system and the first output increment value in the output increment control instruction sequence; and sending the output power of the energystorage system at the next moment to the energy storage system, so that the energy storage system responds to the output power and tracks the photovoltaic power generation plan power at the next moment together with a photovoltaic system in a target photovoltaic-energy storage combined power generation system. The light storage combined power generation system implementing the method can track a photovoltaic power generation plan with high precision, and the state of charge of the energy storage system is kept in a stable and safe state.

A method of mass spectrometry is disclosed comprising alternating between a first mode in which parent ions are analysed and a second mode in which parent ions are fragmented and their fragment ions are mass analysed. In the first mode the parent ions are charge reduced before being analysed, so as to simplify the parent ion spectral data obtained. In the second mode, the parent ions are not charge reduced prior to fragmentation, so that it remains relatively easy to induce the parent ions to fragment. The parent ions are then associated with their fragment ions using the mass spectral data obtained.

The invention discloses a control system for a methanol reforming fuel cell power generation system under a variable load working condition, and the system comprises a fuel supply module, a methanol reforming module, a fuel cell module, an energy storage module, and a control module. Staged control is carried out according to the characteristics of the methanol reforming fuel cell system, regionalization processing is carried out on the power required by the user and the residual capacity of the energy storage module, and difference and delay adjustment is carried out on the output power of the methanol reforming fuel cell system according to the power required by the user and the residual capacity of the energy storage module. According to the invention, the methanol reforming fuel cell system can be quickly recovered and kept in a relatively good state for a long time, the defect of slow response of the methanol reforming fuel cell system is overcome, the impact of variable user demand power on the methanol reforming fuel cell system is avoided, and the requirements of users on global variable user demand power and discontinuous power utilization are met; and efficient and stable operation of the whole power generation system can be ensured.

The invention relates to a passivation modification processing method for an ordered mesoporous carbon surface, a hydrophilic ordered mesoporous carbon and application of the ordered mesoporous carbon. The passivation modification processing method for the surface comprises the following steps that hydrogen peroxide is mixed with the ordered mesoporous carbon, a passivation modification reaction is carried out at a preset temperature of 55 DEG C to 70 DEG C, and the hydrophilic ordered mesoporous carbon is prepared. According to the passivation modification processing method for the ordered mesoporous carbon surface, the passivation modification of the ordered mesoporous carbon is carried out by using the hydrogen peroxide with the strong oxidation property; the reaction can be completed at a relatively mild preset temperature of 55 DEG C to 70 DEG C, the concentration of oxygen-containing groups on the surface of the ordered mesoporous carbon can be greatly improved, the presence of the oxygen-containing groups can improve a contact angle between electrolyte and an electrode material, and so that the originally hydrophobic and inert OMC becomes hydrophilic and has certain chemicalactivity.

The invention discloses a flywheel energy storage and lithium battery composite energy storage system and a working method thereof, and belongs to the technical field of energy storage. The system comprises a DC-AC module, a combined energy storage management system, DC-DC modules, a lithium ion battery energy storage unit and a flywheel energy storage unit. The lithium ion battery energy storage unit and the flywheel energy storage unit are respectively and correspondingly connected with DC-DC modules, all DC-DC modules are connected in parallel and then are connected with the combined energy storage management system, the combined energy storage management system is connected with the DC-AC module, and the DC-AC module is connected with an external power grid. Advantages of flywheel energy storage and the lithium battery can be brought into full play, parts borne by the flywheel energy storage and the lithium ion battery energy storage in different application scenes are optimized, performance advantages of the composite energy storage system are reasonably and efficiently matched and brought into full play, the peak and frequency modulation capacity of the energy storage system under complex conditions is greatly improved, and the defects of a single energy storage system are overcome.

When the sum of a first state of charge of a first battery stack and a second state of charge of a second battery stack is large, a higher state of charge is selected as a priority state of charge. When the sum of first state of charge of the first battery stack and the second state of charge of the second battery stack is small, a lower state of charge is selected as the priority state of charge. A first coefficient and a second coefficient are set in accordance with the priority state of charge. The second coefficient is set so as to be lower than the first coefficient. The product of the first coefficient and the priority state of charge is added to the product of the second coefficient and the other state of charge, to thereby calculate a state of charge of a power storage system.

The present invention provides a method for charging a NiMH battery, comprising estimating a state of charge of the battery (100), determining an end of charging time based on the estimated state of charge (200), applying a constant charging current with a rate in the range from 0.9 C to 2.1 C to the battery until a threshold voltage is reached (300), upon reaching the threshold voltage, applying a constant charging voltage substantially equal to the threshold voltage to the battery (400) and continuing applying the constant charging voltage to the battery until the end of charging time is reached (500). Furthermore, a battery charger adapted to perform such a method as well as a system comprising such a battery charger and a hearing device powered by a NiMH battery are given.

The invention discloses a charge and discharge control method for a storage battery in an independent photovoltaic system. The charge and discharge control method comprises four parts including main charging control, grouped circularly charging during undercharge, maintenance charging and hardware structure application. The charge and discharge control method adopts an efficient charging technology to improve the charge acceptance of the storage battery, so that the storage battery is rapidly charged, and the state of charge of the storage battery is improved while the solar energy is fully utilized, thereby achieving the purpose of prolonging the service life of the storage battery in the photovoltaic system; meanwhile, the charge and discharge control method can avoid the storage batteryfrom being in a state of undercharge all the time, enables groups to reach a fully-charged state, and charges the different groups in this way circularly, thus the storage battery groups can be out of an all-along undercharge state, and the features of the storage battery can be improved.