6results about How to "Avoid charging and discharging" patented technology

The invention provides a new energy range-extended heavy truck energy distribution method based on SOC and driving power, which is applied to a hybrid mode of a hybrid new energy range-extended heavy truck and comprises the following steps: acquiring a vehicle state of the hybrid new energy range-extended heavy truck, historical driving power data and a current SOC of a battery module; determining average driving power based on the historical driving power data; determining a first weighting coefficient based on the current SOC, and determining a second weighting coefficient based on the vehicle state; determining compensation driving power based on the first weighting coefficient and the second weighting coefficient; and determining the required driving power based on the average driving power and the compensation driving power. According to the scheme, the vehicle state and the SOC of the new energy extended-range heavy truck are considered in the hybrid mode, the required generation power is determined in real time, energy distribution is carried out, and the dynamic property and the fuel economy of the system are guaranteed.

This invention discloses a high-precision single-ended read circuit based on a voltage-controlled magnetic anisotropic magnetic memory (VMI). The circuit includes a master-slave RFSE read sensing circuit, a finely adjustable voltage divider circuit, and a read control signal generation circuit. The master-slave RFSE read sensing circuit comprises two independent RFSE read sensing circuits, enabling alternating read operations during the reset and sensing phases. The finely adjustable voltage divider circuit fine-tunes the bit line voltage within a ±10% range of the voltage divider resistor to compensate for process variations and voltage drift. The read control signal generation circuit generates an adjustable asynchronous read control signal through a read delay chain structure. The memory cell being read consists of a magnetic tunnel junction (MTJ) and a memory access transistor. This circuit innovatively introduces a finely adjustable voltage divider circuit, eliminating the need for a traditional reference cell and effectively resisting PVT fluctuations. High-speed, high-precision asynchronous reading is achieved through the master-slave RFSE read sensing circuit and the read control signal generation circuit.

This invention relates to the field of marine power system control technology, and particularly to a hybrid power management method for ships based on the synergy of shaft-driven power generation and lithium batteries. The method includes: real-time acquisition of the ship's power grid load demand, the output power of the shaft-driven power generation system, the state of charge of the lithium battery system, and the rotational speed of the ship's main engine; adaptively determining the current system operating mode; calculating the real-time power difference between the load demand and the output power of the shaft-driven power generation system; generating a target charge / discharge power for the lithium battery system; obtaining a safe command charge / discharge power; controlling the lithium battery system to execute the command charge / discharge power, and controlling the shaft-driven power generation system to operate according to the target of the current mode. Through precise power scheduling and adaptive switching of system operating modes, the method ensures that the ship's power system always operates in an energy-optimal state under different operating conditions.

The invention provides a battery management method based on SOC dynamic correction and charging current limiting, and relates to the technical field of battery management, and the method comprises the steps: obtaining the real-time voltage and real-time current of a monitored battery; calculating the real-time battery electric quantity of the monitoring battery according to the real-time current; if it is determined that the working state is a charging state and the real-time battery electric quantity reaches a preset first electric quantity, the tail end charging current of the monitoring battery is calculated based on the real-time voltage and the real-time current, and a charging circuit of the monitoring battery is controlled to charge the monitoring battery with the tail end charging current; if it is determined that the working state is the discharging state, whether the real-time battery electric quantity is lower than preset second electric quantity or not is judged; and if it is determined that the real-time battery electric quantity is lower than the preset second electric quantity, carrying out discharging tail end pre-undervoltage SOC dynamic correction based on the real-time battery electric quantity, the real-time voltage and the real-time current, and calculating the corrected battery electric quantity of the monitored battery. According to the invention, more intelligent battery management can be realized.

A kind of pressure casting machine pressurization loop hydraulic system, including pressurization cylinder, injection cylinder, pressurization accumulator, proportional flow valve, servo valve and cartridge valve, the piston rod of pressurization cylinder is communicated with the rodless cavity of injection cylinder, the rear cavity of pressurization cylinder is connected with the A port of proportional flow valve, the B port of proportional flow valve is connected with pressurization accumulator, the front cavity of pressurization cylinder is connected with servo valve, cartridge valve respectively.The present application has the following beneficial effects:1, servo valve is set in the pressurization cylinder discharge port, the entire pressurization process is carried out real-time closed-loop control, even when external conditions change, also can guarantee very high repeatability, and the quality of die casting is stable;2, can provide shorter build pressure time, satisfy the rich process requirement to various die castings, and the adaptability is strong;3, pressurization pressure can be quickly adjusted, and then adjust pressurization effect, avoid frequent to accumulator charges nitrogen.

The present application relates to the technical field of power system frequency regulation and new energy grid-connected control, in particular to a kind of energy storage adaptive droop primary frequency modulation method and system of online rolling optimization, the method real-time acquisition system frequency deviation, frequency rate of change and energy storage state of charge;Adopt hot start strategy to inherit the population state of last cycle, and initialize the population of current cycle with the optimal solution neighborhood of last cycle;Through grey wolf optimization algorithm online rolling optimization, to solve optimal droop adjustment coefficient with the multi-objective comprehensive fitness function of frequency regulation performance index, energy storage SOC double threshold nonlinear square penalty and power smoothing term as target;First-order low-pass filter is applied to output to obtain dynamic droop coefficient, according to which the energy storage power reference instruction is calculated and charging and discharging is executed.The present application transforms grey wolf optimization algorithm from offline setting to online rolling optimization engine, realizes millisecond-level real-time response through hot start and simplified iteration, realizes the collaborative optimization of frequency modulation performance and energy storage safety through SOC square penalty, and significantly improves the working condition adaptive ability of system to photovoltaic fluctuation and load disturbance.