34results about How to "Increase charging and discharging power" patented technology

The energy storage system includes multilevel tandem type inverter, asymmetry type current regulator, superconductive magnet, and control system. The magnet is connected to current source inverter of the current regulator. DC output ends of multiple voltage source inverters of the current regulator are connected to DC input ends of multiple inversion units of multilevel inverter. After being connected to bidirectional thyristor, exit at AC side of the multilevel type inverter is connected to electrical network. The current regulator converts large current in superconductive magnet to steady DC voltage to supply DC end of inverter, and the AC end of the inverter is connected to electrical network. Voltage unit of the current regulator is in mode of phase shift control. Switch off at zero current is realized in phase change of current. Phase shift SPWM mode is adopted for switch control. Features are: reducing switching loss, and prolonging service life of switch tube.

The invention belongs to the technical field of lead-acid batteries, and in particular relates to a polar plate of a bipolar battery and a preparation method thereof. The bipolar battery plate includes a bipolar grid, a positive active material and a negative active material, and the bipolar grid is composed of titanium foil and copper plate, and the bipolar grid is positively The lead layer is electroplated on both sides of the negative electrode at the same time, and then the bipolar battery plate prepared by filling the positive active material and the negative active material has high power, high mass specific energy, less gas evolution, strong mechanical strength and corrosion resistance. The current and potential distribution of the plate is uniform; the preparation method of the invention can reduce production costs, reduce environmental protection pressure and improve battery performance.

The invention provides a battery system for a vehicle, comprising: an energy storage device, the energy storage device includes a plurality of battery packs coupled in series, and an inter-battery switch is arranged between adjacent battery packs; a DC charging and discharging interface, a DC charging and discharging interface The positive terminal of the interface is coupled to one end of the switch between the positive poles, the other end of the switch between the positive poles is coupled to the positive terminal of the battery pack, the negative terminal of the DC charging and discharging interface is coupled to one end of the switch between the negative poles, and the other end of the switch between the negative poles is coupled to Connected to the negative terminal of the battery pack; the control unit is connected to the energy storage device, the switch between the batteries, the switch between the positive poles and the switch between the negative poles, so as to realize the charging and discharging mode of the battery pack according to the high-voltage charging and discharging mode, the low-voltage charging and discharging mode, and the protection charging and discharging mode. One of the charging or discharging. It also provides a charging and discharging method for the battery system of the vehicle, which solves the problem that the electric vehicle with a high-voltage platform battery cannot be charged when it encounters a low-voltage charging and discharging pile, and improves the applicability and safety of the vehicle.

The voltage compensator is composed of following parts: for charging module of superconducting energy storage, charging module is composed of a rectification bridge in three phase, a filter and a electronic switch; connected to DC side of charging module and inversion module in parallel and in use for storing electrical energy in DC form, the module of superconducting energy storage consists of a superconducting coil, a electronic switch, a power diode and a capacitance; in use for outputting offset voltage, the inversion unit includes inversion bridge in three phase; in use for connecting dynamic voltage compensator to power system, the isolation filtering unit includes three pieces of isolating transformer and three capacitors. The disclosed dynamic voltage compensator meets the need for compensating voltage fall off at short time in power system. Comparing with prior art, the disclosed dynamic voltage compensator possesses better dynamic response and longer compensating time.

A high-power ring-shaped energy storage battery, including several layers of ring-shaped walls made of solid electrolyte coaxially set together, the two ends of the ring-shaped wall are respectively fixed on the insulating circular base and the circular upper cover, all the ring-shaped walls Together with the circular base and the circular upper cover, several layers of airtight chambers are enclosed together. The adjacent airtight chambers are filled with positive electrode materials or negative electrode materials at intervals. When the battery is running, the positive and negative electrode materials are both in liquid state; The bottom of the body draws out the positive and negative current lead-out poles respectively and gathers them to form the positive and negative poles of the battery. The battery provided by the invention has a large electrochemical reaction area and a current flow area, has excellent electronic conductivity, can reach a sufficiently large current density, and ensures a sufficiently high charge and discharge rate and power, and has a simple structure and low cost. It is cheap, can determine size parameters according to different capacity requirements, is easy to expand in scale, and can meet different capacity and space requirements.

The invention discloses a method for preparing modified zinc oxide. The modified zinc oxide is prepared by coating bismuth oxide on zinc oxide; according to the weight percentage, the contents of the bismuth oxide is 5-25 percent and the zinc oxide is 75-95 percent; and one of sodium hydroxide or potassium hydroxide is mixed with zinc oxide and bismuth nitrate, the mixture is ball-milled to prepare a precursor of a Bi(OH)3-coated ZnO, and then the thermal decomposition is carried out to the precursor in the high temperature environment to obtain the bismuth oxide coated modified zinc oxide. The prepared modified zinc oxide as the anode material of a secondary zinc electrode has the advantages of low price, environmental protection, less investment, good electric conductivity, high charge acceptance, high specific capacity, long cycle life and the like.

The invention discloses a porous zinc-nickel alloy negative electrode material for a zinc-air battery and a preparation method thereof, belonging to the field of new energy technology development. The porous zinc-nickel alloy negative electrode material of the present invention is composed of a foamed nickel substrate and a zinc-nickel alloy coating evenly coated on the foamed nickel substrate; the molar ratio of nickel to zinc in the zinc-nickel alloy coating is 0.01-0.20:1. In the present invention, nickel foam is used as the cathode, and zinc and nickel are deposited on the surface of the nickel foam substrate by electroplating in an electroplating solution containing functional additives to obtain a nickel-zinc molar ratio of 0.01-0.20:1, a pore diameter of 20-500 μm, and a coating thickness of 10 μm- 2000μm porous zinc-nickel alloy anode material for zinc-air batteries. The structure design of the material in the invention is reasonable, the preparation process is simple, and it is convenient for large-scale industrial application and production.

The invention relates to a metal-air battery system, which includes a housing, an air diffusion electrode, a metal electrode, an electrolyte solution containing an alkaline electrolyte, and an electrolyte accelerating device. The first channel of the electrolyte; the first channel communicates with the outside of the casing through an external conduit to form an electrolyte circulation circuit for accommodating the flow of the electrolyte; the electrolyte acceleration device is connected to the electrolytic In the liquid circulation circuit, it also includes a second channel formed on the other side of the metal electrode and communicated with the first channel through the metal electrode, the second channel communicates with the outside of the housing through the The external conduit is connected, and the metal electrode is a foam matrix, which avoids the phenomenon of irregular consumption of the metal electrode, is conducive to improving the charging and discharging power and the stability of the battery, and alleviates the growth of metal dendrites to prolong the service life.

The invention discloses a porous zinc-tin alloy negative electrode material for a zinc-air battery and a preparation method of the porous zinc-tin alloy negative electrode material, belonging to the field of new energy technology development. The porous zinc-tin alloy negative material comprises a foamed nickel substrate and a zinc-tin alloy plating layer, wherein the zinc-tin alloy plating layer is uniformly coated on the foamed nickel substrate, tin and zinc in the zinc-tin alloy plating layer are uniformly distributed, and the mole ratio of tin to zinc is (0.01-0.20):1. In the porous zinc-tin alloy negative electrode material, foamed nickel is taken as a negative electrode, electroplating is carried out in an electroplating liquid containing a complexing agent to obtain the porous zinc-tin alloy negative electrode material, and the electroplating liquid containing the complexing agent is selected from one of a pyrophosphate system electroplating liquid, a gluconate system electroplating liquid, a citrate system electroplating liquid and a tartaric acid system electroplating liquid. The porous zinc-tin alloy negative electrode material has the advantages that the material structure is reasonable in design, the preparation process is simple, and industrial application and production at a large scale are promoted.

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.