40results about How to "Avoid charging and discharging" patented technology

The invention discloses an active optimal control system of a wind and light storage combined power generation system and a method. The active optimal control system comprises a wind and light storage combined power generation system control central station and wind and light storage combined power generation system control substations. The method includes drawing out a power output curve of a wind power station, a photovoltaic power station and an energy storage power station according a planed power output curve and by considering correlated conditions of the wind power station, the photovoltaic power station and the energy storage power station, and distributing correlated plans to all control substations; and working out generation plans of corresponding control units according to power output plans distributed by all control substations, and executing power output plans distributed by control substations finally by the control units. By the aid of the control process, the wind and light storage combined power generation system can be guaranteed to operate according to the force output curve, charge-and-discharge times of storage batteries can be reduced, low current charge-and-discharge of the energy storage power station is avoided, the short-time overload capability of the energy storage power station is fully utilized, and the service life of the energy storage power station is prolonged.

The invention relates to the field of electric automobile, and in particular relates to a battery pack structure of electric automobile and charging and discharging method of battery pack. The electric automobile is provided with at least one low speed charging interface and fast charging interface being corresponding to the number of the battery pack unit, a fast charging switch controlling the battery pack unit for fast charging is formed between each fast charging interface and each battery pack unit, many battery pack units can be charged at the same time and the charging time is shortened. The low speed charging/discharging total switch and low speed charging/discharging switch are formed between the battery pack unit and the low speed charging interface, the low speed charging/discharging total switch and low speed charging/discharging switch control the discharging and low speed charging operation of each battery pack unit, the charging/discharging process of the battery pack units is independent to each other for avoiding cask effect and reducing cost of production needed by higher consistency requirement on the battery pack unit in the battery pack.

A portable power source system including a battery pack housing at least one secondary battery, wherein first and second internal terminals for connecting to a pair of external terminals are provided inside the battery pack, and two or more operations in different operating directions are required to connect the external terminals to the internal terminals. The battery pack includes external terminal inserting portions for inserting the external terminals, and the two or more operations include a first operation including inserting the external terminals into the external terminal inserting portions and a second operation in a direction different from that of the first operation. In a state before the first operation is performed, at least one of the internal terminals is shielded with a protective cover, and the protective cover recedes from a position for shielding the internal terminal, in conjunction with the first operation, the second operation or a combination of the first operation and the second operation, thereby enabling a connection of the external terminals to the internal terminals.

The invention discloses a method and a system for circularly charging and discharging an energy storage component. The system comprises an energy storage component and a power generating device. The method comprises the following steps of: dividing the energy storage component into a plurality of energy storage units; during discharge, discharging one energy storage unit at first, and then discharge next energy storage unit when the voltage of the previous energy storage unit is dropped to an undervoltage region from high pressure saturation region; and during charge, charging one energy storage unit by the power generating device at first, and switching to charge the next energy storage unit when the voltage of the previous energy storage unit is increased from the undervoltage region to the high pressure saturation region. The method can be used for effectively prolonging the service life of the energy storage component.

The invention relates to a cascade utilization energy storage battery energy control method and system for an energy storage unit; the method comprises the following steps of acquiring a power commandvalue of the cascade utilization energy storage battery of each energy storage unit at the current moment; obtaining a power command value of the cascade utilization energy storage battery of each energy storage unit at the next moment according to the power command value of the cascade utilization energy storage battery of each energy storage unit at the current moment through a pre-establishedrecurrent neural network model; and adjusting the current discharging rate of the cascade utilization energy storage battery of each energy storage unit according to the power command value of the cascade utilization energy storage battery of each energy storage unit at the next moment. By virtue of the technical scheme, the power command value is predicted through the recurrent neural network, sothat the problem that due to the fact that the power change is too large, the battery output is sharply increased is avoided, and a response can be made in advance, so that the use of the cascade utilization battery is more stable; and the energy control method of the energy storage system is optimized, and energy management efficiency of the energy storage system is improved.

A method for stabilizing photovoltaic power fluctuation in a hybrid energy storage system includes the steps of: calculating a low-pass filtering constant, and performing low-pass filtering on photovoltaic power; calculating charging and discharging reference power of a storage battery; calculating charging and discharging reference power of a supercapacitor; and performing hybrid energy storage and charging and discharging at the same time, thereby achieving the purpose of stabilizing photovoltaic power fluctuation. The method provided by the invention can determine charging and discharging schemes of different time scales according to difference of storage battery and supercapacitor hybrid energy storage dynamic response characteristics, thereby achieving the purpose of stabilizing photovoltaic power; and residual energy of the storage battery is considered, the filtering coefficient is adjusted, and deep charging and discharging of the storage battery are prevented, thereby achieving the purposes of prolonging the service life of the storage battery and improving system economical efficiency.

The invention relates to a UPS (Uninterrupted Power Supply) system and a UPS system intelligence charging-discharging circuit thereof, which are used for providing electrical energy conversion in the UPS system so as to realize charging and discharging of storage batteries in the UPS system. The UPS system comprises a direct-current power supply, a controller, a communication unit, a plurality of storage batteries and a load; the inner part of the controller comprises a DSP (Digital Signal Processor) module, an anode busbar, a cathode busbar and an electric energy monitoring module; the electric energy monitoring module comprises the UPS system intelligence charging-discharging circuit, a drive circuit, a current sampling module and a voltage sampling module. The UPS system is characterized in that the UPS system intelligence charging-discharging circuit is provided with an anode connecting terminal, an energy storage terminal, an adjusting terminal and a short connected terminal; the UPS system intelligence charging-discharging circuit comprises a capacitor C1, switch tubes Q1 and Q2, and an inductor L1. The UPS system and the UPS system intelligence charging-discharging circuit thereof enable multiple groups of storage batteries in different specifications in the UPS system to charge and discharge at the same time, so that abnormal storage batteries are prevented from influencing charging and discharging of other storage batteries.

The invention discloses a lithium ion power battery charging and discharging method, which overcomes the problem of short service life of the battery in the prior art, and comprises a first charging and discharging method and a second charging and discharging method.The first charging and discharging method is to limit the charging power of the lithium iron phosphate battery system, and the secondcharging and discharging method is used for limiting the charging electric quantity and the discharging electric quantity of the ternary and high-voltage ternary battery system. The charging and discharging voltage interval of the battery is strictly limited, the charging and discharging voltage is controlled, charging and discharging under the condition of a low SOC interval are prevented, the internal stress of the battery is reduced drastically, overcharging caused by charging and discharging under the condition of a high SOC interval of the ternary battery is reduced, and the service lifeof the lithium ion battery can be prolonged.

The invention provides a mode switching system and method for a hybrid electric vehicle with the function of external connection. The mode switching system comprises a manual button, a central processing unit, an electric motor flywheel rotating speed sensor, an engine flywheel rotating speed sensor, an engine controller and an electric motor controller, wherein the manual button is used for performing system mode manual switching by a driver; the central processing unit is used for receiving and transmitting electrical signals of the manual button, the electric motor flywheel rotating speed sensor, the engine flywheel rotating speed sensor, the electric motor controller and the engine controller; the electric motor controller is used for controlling the operation of an electric motor; the engine controller is used for controlling the operation of an engine; the electric motor flywheel rotating speed sensor is used for collecting a flywheel rotating speed signal of the electric motor; the engine flywheel rotating speed sensor is used for collecting a flywheel rotating speed signal of the engine. Through the adoption of the mode switching system disclosed by the invention, frequent charging processes and frequent discharging processes of an accumulator group are avoided, the service life of an accumulator is prolonged, and the operational efficiency of the accumulator is improved.

The invention relates to a lithium ion battery module management circuit. The lithium ion battery module management circuit comprises a single chip, a parameter detection circuit, a first field-effecttube driving circuit, a second field-effect tube driving circuit, a first field-effect tube, a second field-effect tube, a fuse and a series battery module, wherein the parameter detection circuit, the first field-effect tube driving circuit and the second field-effect tube driving circuit are connected with the single chip. Besides battery module parameter detection and communication functions,the lithium ion battery module management module has another protection function independent of battery pack systems, so that battery modules can be independently protected, over-charging and over-discharging of the battery modules are avoided, and the battery modules are prevented from being charged and discharged at ultrahigh temperatures or ultralow temperatures; and the structure of the battery module management circuit can be realized by protection switches of the battery modules by adoption of field-effect tubes and the field-effect tubes only need to bear the voltage of the battery modules in specific application, so that low-cost field-effect tubes which resist low voltage and low-pass impedance can be selected, and then good economy and high cost performance are provided.

The invention discloses a multi-channel thermal resistance measuring device. The device comprises a test constant current source, a complement constant current source, a mutual exclusion change-over switch group and a plurality of channel circuits; the test constant current source and the position-complementing constant current source are connected to the channel circuit in a mutual exclusion manner through the mutual exclusion change-over switch group; and the channel circuit comprises a working channel circuit and an idle channel circuit, the working channel circuit is powered by using the mutual exclusion change-over switch group through the test constant current source, and the idle channel circuit is powered by using the complement constant current source. According to the invention, the complement constant current source and the test constant current source are switched through the mutual exclusion switch group, so that the charging and discharging process of the capacitor in the circuit is avoided, the current flowing through the thermal resistor to be tested does not jump, the measurement efficiency is greatly improved, and the measurement accuracy is improved at the same time. The invention also provides a redundant multichannel thermal resistance measuring device and temperature measuring equipment with the above beneficial effects.

Provided is a technology for a single charging device to charge multiple energy storage devices simultaneously. The technology is used for a single charging device to charge multiple energy storage devices simultaneously. Different energy storage devices differ in residual voltage. When the energy storage devices are connected in parallel by conductors, as the internal resistance is very small, there is charging and discharging current between the energy storage devices, and components and the conductors may easily be heated, fail or crack. In order to avoid the problem, each charging branch inside the charging device (or in the back of the load side) is connected in series with a controllable switch, and different energy storage devices are charged one by one in time order. Each charging branch inside the charging device (or in the back of the load side) is connected in series with a group of diodes. When there is a need to charge multiple energy storage devices simultaneously, the charging and discharging current between different energy storage devices is blocked based on the one-way current passing capacity of the diodes. Thus, a single charging device can charge multiple energy storage devices simultaneously, without the need to connect a controllable switch in series to each charging branch or charge different energy storage devices one by one in time order.