40results about How to "Realize charge and discharge control" patented technology

The invention discloses an energy storage system of a hybrid automobile, which comprises at least one battery pack formed by connecting a plurality of batteries in series, at least one capacitor branch circuit formed by connecting a plurality of super capacitors in series, a battery discharge control circuit and a battery charge control circuit, wherein the input end of the battery discharge control circuit is connected with the input ends of all battery packs, while the output end is connected with the input ends of all capacitor branch circuits; the negative poles of all battery packs and the capacitor branch circuits are connected; and the input end of the battery charge control circuit is connected with a power supply end of a generator, while the output end is connected to the input end of the battery pack. The energy storage system can overcome the drawbacks of various conventional energy storage devices, has the combined advantages of the super capacitors and the batteries and has a prolonged overall service life.

The invention relates to a charging-discharging control method of a cell energy storing system in a wind power plant, which belongs to the technical field of optimized computing of a power system, and comprises the steps of adopting a dual-process computing method based on a modern interior point method for resolving a model by aiming at a charging-discharging control model of a BESS(battery energy storing system) in the wind power plant under three modes of wind power peak-clipping valley-filling, power smoothing and tracking curve, thus fast and effectively resolving the charging-discharging control model and obtaining the active power value outputted by the BESS in each time period in the control time. The charging-discharging control method has better convergence and limits the charging-discharging energy of the BESS in one period, thus facilitating prolonging the service life of a cell. The active power adjusting interval of the BESS can be reduced by performing interpolation on the active power predicted data of the wind power plant, thus performing limiting on the active power fluctuation of the wind power plant in different time scales.

The invention discloses a floating charge protection type lithium iron phosphate storage battery which comprises a lithium iron phosphate positive electrode, a lithium iron phosphate negative electrode, an isolating membrane, an electrolyte and a shell, wherein the shell comprises a cover plate component and a shell body; the cover plate component comprises a cover plate, a positive pole component, a negative pole component, a liquid injection hole and a detachable safety valve; the liquid injection hole is formed in the center of the cover plate and is provided with a threaded flange; the liquid injection hole is raised towards the outer side of the cover plate to form a tubular cavity; the diameter of the tubular cavity is greater than that of a needle head of a liquid injection machine; the inner wall of the tubular cavity is provided with threads; the detachable safety valve is arranged at the liquid injection hole; after the safety valve is detached down, the electrolyte of the battery can be repeatedly supplemented. When being applied to the direct current system of electric power engineering, the battery can be used as a standby power supply of a power plant and a transformer substation. As for the wiring mode of the direct current system of the lithium iron phosphate battery, except that a storage battery body externally adopts automatic current sharing, storage battery protection devices are connected in parallel at two ends of each storage battery; the capacity of a lithium iron phosphate storage battery pack is properly no more than 200Ah when the battery is used in the substations of 110KV or below. By adopting the floating charge protection type lithium iron phosphate storage battery, the potential safety hazard of the storage battery in long-term floating charge operation is eliminated.

The invention relates to scheduling and operation of power systems, in particular to an energy storage frequency modulation system and method. The energy storage frequency modulation system comprisesa storage battery 1, a super-capacitor 3, a first DC/AC circuit 2, a second DC/AC circuit 4, a medium-frequency transformer 5, a third DC/AC circuit 6, a DC capacitor 7 and a PCS circuit. Compared with the prior art, the energy storage frequency modulation system has the beneficial effects that the storage battery and the super-capacitor are adopted as energy storage mediums, so that the characteristics that the storage battery is high in energy density, low in cost and diverse can be developed, and the advantages that the super-capacitor is high in charge and discharge power and good in dynamic response can also be developed, thereby achieving mixed utilization of two energy storage mediums and improving the characteristics of the energy storage system.

The invention provides a control method and device of a distributed power supply, and the method and device are suitable for the technical field of new energy. The method comprises the average, upper limit and lower limit of electricity price are calculated according to a predicted electricity price; if real-time electricity price is lower than or equivalent to the lower limit of the electricity price, charging power of an energy storage battery is set and a charging process is started; if the real-time electricity price is greater than or equivalent to the upper limit of the electricity price, discharging power of the energy storage battery is set and a discharging process is strated; and if the real-time electricity price is between the upper limit and the lower limit of the electricity price, the charging process and the discharging process of the energy storage battery are stopped. According to embodiments of the invention, the randomness and fluctuation of the distributed power supply are taken into consideration, the charging and discharging power of the energy storage battery is set by combining the predicted electricity price and the real-time electricity price, charging and discharging control for the energy storage battery is realized, intermittent energy absorption and optimization are realized, peak clipping and valley filling functions of the electrical network are realized, and the power utilization cost of users is effectively reduced.

A spacecraft in-orbit multifunctional structure integrated management and control system comprises a multifunctional structure unit, a power management unit, a data processing unit, and a discharge load unit. The multifunctional structure unit integrates the bearing, power supply and vibration reduction functions. The power management unit controls charge/discharge operation, detects and adjusts the electrical performance parameters of power modules in real time, and transmits the parameters to the data processing unit. The data processing unit acquires the mechanical/electrical performance parameters of system operation and submits the parameters to a spacecraft platform through a remote sensing and data transmission interface, and the parameters are finally transmitted back to the ground. The discharge load unit consumes power under control of the power management unit. According to the system, a spacecraft structure and a power source are fused in a multifunctional manner, power source charge/discharge management, structure mechanics/electrical performance monitoring, and data management and transmission are integrated together, and the task process from remote control instruction receiving to multifunction implementation and further to state monitoring and data management and transmission can be executed systematically.

The invention discloses a battery protection circuit board, which comprises a control chip, wherein a control transistor is integrated in the control chip, and the control transistor is connected between a second voltage end and a third voltage end; the battery protection circuit board further comprises a substrate voltage selection circuit and a gate voltage control circuit; the substrate voltageselection circuit is electrically connected with the substrate end of the control transistor and is used for outputting the lowest voltage of the system to the substrate end of the control transistor; and the gate voltage control circuit is used for generating gate voltage for controlling a conduction state of the control transistor, the control transistor is used for conducting or turning off according to the gate voltage, and the battery protection circuit board is used for charging or discharging a battery when the control transistor is conducted. According to the battery protection circuit board of the invention, charging or discharging of the battery is realized through the control transistor integrated on the control chip, the area of the circuit board is reduced, and the productioncost is reduced.

The invention discloses a distributed photovoltaic power station user side three-phase imbalance counter-current prevention device and method. The counter-current prevention device is composed of a rectified three-phase circuit, a bidirectional DC-DC conversion, an energy storage battery and a microprocessor connected in parallel at the load side; an incoming line end of the rectified three-phasecircuit is connected with an outgoing line end of a photovoltaic inverter, and the outgoing line end thereof is orderly connected with the bidirectional DC-DC conversion circuit and the energy storagebattery to form a charging main loop of the imbalance current; the outgoing line end of the rectified three-phase circuit is connected with the incoming line end of the inverter through a contactor switch so as to form a battery discharging loop; the microprocessor realizes the charging/discharging control on the battery by driving the rectified three-phase circuit, the contactor switch and the DC-DC circuit switch tube. The distributed photovoltaic power generation and the battery energy storage system are combined, the problem of the countercurrent power of the current caused by the three-phase load imbalance at the user side is solved by connecting the energy storage system in parallel at the load side, and the safe, stable and economic operation of the system is effectively guaranteed.

The invention provides an electric vehicle bidirectional charging and discharging system and a control method thereof, the electric vehicle bidirectional charging and discharging system is mainly composed of a DC/DC converter and an ANPC converter, and the electric vehicle bidirectional charging and discharging system can automatically judge and operate in a single-stage mode or a two-stage mode.In a two-stage operation mode, the control is divided into two parts: the ANPC converter is controlled by a voltage outer loop current inner loop PI regulator to stabilize the bus voltage; the DC/DC converter is mainly used for realizing constant-voltage, constant-power and constant-current charging and discharging control on the battery of the electric automobile; and in the single-stage operation mode, the DC/DC converter stops operating, the ANPC converter independently completes constant-voltage, constant-power and constant-current charging and discharging control over the battery of the electric automobile, the control mode is flexible, and the operation efficiency of the bidirectional charging and discharging system of the electric automobile is improved.

The invention discloses a battery energy storage system SOC balance control system, method and device and a storage medium. The system comprises a battery management system, an LCC resonant converter, a battery module and an acquisition unit. The LCC resonant converter provides voltage and current required by SOC equalization for the battery module; the acquisition unit acquires the running state information of the single battery and sends the running state information to the battery management system; switches are respectively arranged at the two ends of each single battery in the battery module; and the battery management system controls the voltage or current provided for the battery module by the LCC resonant converter based on the operation state information of the battery module, and controls the on-off of the switches at the two ends of the battery monomer, thereby realizing SOC equalization. The system integrates LCC power control and a reconfigurable battery circuit topological structure, and can be reconfigured to realize charge and discharge control and balance control between battery modules in the battery energy storage system. The semiconductor device and the inductor are shared in different working modes, so that the structure is compact.

The invention provides a control method for a charging voltage set value of a hybrid electric vehicle-mounted 12V power supply. A whole vehicle controller and a sensor which is integrated on a low-voltage battery are used in the method. The method comprises the steps of connecting the whole vehicle controller with the sensor by CAN communication, and calculating the voltage set value of a low voltage side of a transformer according to detecting information of the sensor; when the voltage set value is greater than the voltage of the low-voltage battery, controlling the transformer to acquire electric energy from a high-voltage battery side and charge the low-voltage battery by the whole vehicle controller through CAN communication; when the voltage set value is smaller than the voltage of the low-voltage battery, directly supplying power for a vehicle-mounted low-voltage power consumption unit by the low-pressure battery, acquiring the voltage set value and judging according to the voltage set value; and acquiring electric energy from the low-voltage battery or charging the low-voltage battery.

The invention discloses a multi-alternating-current-port high-voltage direct-hanging energy storage power conversion system and a control method thereof. The system comprises a cascaded H-bridge energy storage system which comprises a plurality of H-bridge direct-current sides connected with an energy storage battery in parallel and then cascaded; and a multi-alternating-current-port flexible interconnection module which is connected in series with the cascaded H-bridge energy storage system, and comprises a plurality of first single-phase converters and second single-phase converters connected in parallel and connected with the same common connection bus. According to the invention, interconnection of multiple alternating-current feeder lines and energy storage sharing are realized, charge and discharge control of CHBESS can be realized, and flexible interconnection of alternating-current power grids is realized while an energy storage function is realized; the active power control is realized by adopting a series voltage source mode without full power, so that the occupied area is small, the cost is low, the loss is small, and the response speed is high; and the multi-port flexible interconnection module has the characteristics of modularization and easy expansion, and expansion of the interconnection ports can be quickly and flexibly realized by increasing the number of the first single-phase converters connected in parallel in the interconnection module.

A new energy vehicle, a power supply control method and a storage medium, belonging to the technical field of new energy vehicles. It includes a central control module, a power management module and a battery array. The power management module is connected to the central control module. It is characterized in that: a battery adaptation module and a voltage acquisition module corresponding to the battery modules in the battery array are provided, and the battery adaptation module and The voltage collection module is connected to the power management module; a power collection module and a temperature collection module are provided, and the output terminals of the power collection module and the temperature collection module are connected to the power management module; a temperature regulation module connected to the battery array is also provided, The power management module is bidirectionally connected with the temperature regulation module to regulate the temperature of the battery array. In this application, the idea of ​​equalizing the battery in series to control battery voltage or capacity is abandoned, eliminating the waste of capacity energy and power loss caused by equalization, and realizing adaptive power supply for new energy vehicles.