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

The invention provides a battery heating method and a system of an electric vehicle. The battery heating method comprises the steps of: obtaining the temperature of a battery; judging if the temperature is lower than a first temperature threshold; if so, obtaining a remainder electric quantity of the battery and judging if the remainder electric quantity is higher than an electric quantity threshold; if so, discharging the battery by a first preset time, and storing energy in an energy storage device; then, using the energy storage device for charging the battery by a second preset time; and circulating the step until the temperature of the battery reaches a second temperature threshold. The method and the system uses self-heating characteristic of the battery in the charge / discharge process for heating the battery from inside to outside; compared with a method for heating the battery by external heating equipment in the prior art, the battery heating method is more balanced in heating, and facilitates prolonging of the service life of the battery; and the heat is from the internal of the battery, so that the heating efficiency is higher.

The invention relates to a lithium-sulfur flow battery and a positive electrode electrolyte thereof, as well as a preparation method of the positive electrode electrolyte. The lithium-sulfur flow battery comprises a battery module, the positive electrode electrolyte, a negative electrode electrolyte, a positive electrode electrolyte storage tank, a circulating pump and a circulation line, wherein the battery module is formed by connecting a single cell or more than two single cells in series, the single cell comprises a negative electrode current collector, a lithium negative electrode, a diaphragm, a positive electrode, a positive electrode current collector and a sealing element, and the positive electrode electrolyte which is a mixed solution of Li2S8 containing nano sulfur powder and lithium trifluoromethanesulfonate or trifluoromethane sulfonic acid lithium imide is filled in the positive electrode electrolyte storage tank, wherein the solvent is a mixed solvent which comprises tetraethylene glycol dimethyl ether or glycol dimethyl ether and 1,3-dioxolane at a volume ratio is (1:5)-(5:1) is taken as a solvent. Compared with a traditional lithium-sulfur battery, the lithium-sulfur flow battery has the advantages that the cycle life and the charge and discharge power are improved; an independent positive electrode electrolyte storage tank structure is adopted, so that the capacity is not controlled by an electrode area.

The invention discloses a brake energy recovery system and method of an electric vehicle. The brake energy recovery system of the electric vehicle comprises an energy conversion unit, an inverting unit, an energy storage unit and an energy storage unit management system, wherein the energy conversion unit is used for converting mechanical energy generated during braking into electrical energy and converting the electrical energy into the mechanical energy for driving a vehicle during driving; the inverting unit is connected with the energy conversion unit and used for inverting between alternating current and direct current; the energy storage unit is used for receiving the electrical energy generated by the energy conversion unit and can provide the electrical energy; the energy storage unit management system is connected between the inverting unit and the energy storage unit and used for controlling charge and discharge of the energy storage unit; and the energy storage unit comprises a super-capacitor energy storage unit and a chemical battery energy storage unit, wherein the super-capacitor energy storage unit is connected with the chemical battery energy storage unit in parallel through the energy storage unit management system. Through the system and method disclosed by the invention, the brake energy recovery efficiency can be improved, and the service life of the battery can be prolonged.

The invention provides a method of reducing wind power wind curtailment and a device thereof. The method comprises the following steps of acquiring a wind speed of a wind power plant and real-time output, and determining wind curtailment power of the wind power plant; determining wind curtailment amounts of an energy storage system and a heat-accumulating-type electric boiler which simultaneously participate in consumption; determining a target function, solving the target function and acquiring operation power of a heat-accumulating-type electric boiler tracking wind power wind curtailment mode used for reducing wind power wind curtailment, a capacity of the energy storage system and maximal charge and discharge power. In the invention, the energy storage system can dynamically absorb and release electric energy so that power grid dispatching is realized in real time. When wind power output is excessive, electric energy is stored so as to reduce wind curtailment. When wind power output is insufficient, the electric energy is released so as to satisfy a heat-accumulating-type electric boiler demand so that operation power of the heat-accumulating-type electric boiler is adjusted as little as possible. The wind power wind curtailment is reduced and a wind power utilization rate is increased. The energy storage system is used to coordinate heat-accumulating-type electric boiler consumption wind power wind curtailment, and simultaneously heat supply is provided for residents and environmental pollution is reduced.

The invention provides a vehicle battery system. The battery system comprises an energy storage device, a direct-current charging and discharging interface and a control unit, wherein the energy storage device comprises a plurality of battery packs which are coupled in series, inter-battery switches are arranged between every two adjacent battery packs; the positive pole end of the direct-currentcharging and discharging interface is coupled with one end of an inter-positive switch, and the other end of the inter-positive switch is coupled with positive pole ends of the battery packs, the negative pole end of the direct-current charging and discharging interface is coupled with one end of an inter-negative switch, and the other end of the inter-negative switch is coupled with the negativeelectrode ends of the battery packs; and the control unit is connected with the energy storage device, the inter-battery switches, the inter-positive switch and the inter-negative switch so as to realize charging or discharging of the battery packs according to one of a high-voltage charging-discharging mode, a low-voltage charging-discharging mode and a protection charging-discharging mode. The invention further provides a charging and discharging method of the vehicle battery system. According to the method and the system, the problem that an electric vehicle with a high-voltage platform battery cannot be charged through a low-voltage charging and discharging pile is solved, and the applicability and the safety of the vehicle are improved.

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.

The invention relates to a high-power charging and discharging lithium ion battery positive electrode material Li2Fe2(MoO4)3 and a preparation method thereof. The preparation method comprises the following steps: firstly, mixing a sodium molybdate aqueous solution with a ferric nitrate aqueous solution in the molar ratio of 3 to 2; regulating the pH of the mixed solution to 0.8 to 1.5, and heating to 160 to 200 DEG C to perform a hydrothermal reaction in order to obtain iron molybdate (Fe2(MoO4)3) powder as a precursor; then, adding the iron molybdate powder into an organic solution (acetonitrile or dimethyl formamide) containing lithium iodide (LiI) for refluxing; separating to obtain a high-activity Li2Fe2(MoO4)3 electrode material. Prepared lithium iron molybdate is taken as the lithium ion battery positive electrode material, has the advantages of high charging and discharging power, stable material performance, high safety and the like, and is suitable for the field of high power output of electric automobiles and the like.

The invention belongs to the technical field of a lead-acid storage battery and specifically relates to a bipolar battery pole plate and a preparation method thereof. The bipolar battery pole plate comprises a bipolar plate grid, a positive electrode active material and a negative electrode active material. The bipolar plate grid is composed of a titanium foil and a copper plate. The bipolar battery pole plate prepared by electroplating a lead layer on positive and negative poles of the bipolar plate grid simultaneously, and then, coating the positive electrode active material and the negativeelectrode active material is high in power, high in mass specific energy and small in gas evolution amount, and has better mechanical strength and corrosion resistance, and pole plate current and potential are evenly distributed. The preparation method can reduce production cost, reduce environmental protection pressure and improve battery performance.

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 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 discloses a charging-and-discharging control device which comprises a motor, an electric driving circuit, a power supply voltage sampling circuit, a charging-and-discharging current sampling circuit and a control chip, wherein the control chip is used for transmitting a first pulse width modulation (PWM) driving signal to the electric driving circuit. The first PWM driving signal is used for making the electric driving circuit store electric energy of an external power supply into an inductor of the motor and charge a battery by means of the electric energy stored in the inductor of the motor. Alternatively the control chip is used for transmitting a second PWM driving signal to the electric driving circuit, wherein the second PWM driving signal is used for making the electric driving circuit store the electric energy of the battery into the inductor of the motor and performing electric energy feedback to the external power supply by means of the electric energy stored in the motor. The charging-and-discharging control device provided by the invention facilitates cost reduction of the charging-and-discharging control device and reduces land occupation area.

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.

Provided is an all-electric mine car transport system. Utility poles are buried on a special lane; a medium-voltage direct-current contact line system is set up on the utility poles; an electric minecar controller is wirelessly connected with a monitor center; a driver of the monitor center sends out a control command to control contact or separation between a carbon brush slider on a pantographof a dual-power-mode power supply portion and the medium-voltage direct-current contact line system, so that the medium-voltage direct-current contact line system can directly power an electric mine car or powers the electric mine car through a vehicle-mounted battery. The dual power modes of medium-voltage direct-current contact line system and the battery are employed herein to power the electric mine car; flexibility of a traditional mine car is maintained, and long-range endurance and nonstop charging can also be achieved; electric energy generated by regenerative braking of a brake of theelectric mine car generated during downhill braking can be fed back to a power grid for other vehicles to use; high voltage of contact line system is employed, so that each pair of contact lines canbear more electric mine cars, and longer lines can be erected.

The invention relates to a novel metal air battery system. The novel metal air battery comprises a shell, an air diffusion electrode, a metal electrode, an electrolytic solution containing an alkaline electrolyte, an electrolyte accelerating device and a second channel, wherein a first channel for accommodating the electrolytic solution is formed between the air diffusion electrode and the metal electrode; the first channel communicates with the outside of the shell through an external conduit to form an electrolytic solution circulation loop in which the electrolytic solution flows; the electrolyte accelerating device is connected into the electrolytic solution circulation loop; the second channel is formed on the other side of the metal electrode, and communicates with the first channel through the metal electrode; the second channel communicates with the outside of the shell through an external conduit; the metal electrode is a foam substrate. By adopting the novel metal air battery system, the phenomenon that the metal electrode is consumed irregularly is avoided, the charging and discharging power and the stability of a battery are favorably improved, the growth of a metal dendritic crystal is retarded, and the service life is prolonged.

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 relates to a lithium ion capacitor and a preparation method therefor. The method enables a positive plate and a negative plate to achieve the relative movement through the arrangement of a moving part on the positive plate, thereby changing the relative area of the positive plate and the negative plate, achieving the adjustment of the capacitance value of the lithium ion capacitor in a certain range, and improving the applicability of the capacitor. Meanwhile, by improving the positive and negative plates of the capacitor and the electrolyte, the output efficiency of the capacitor is improved, and safer and more stable charging and discharging are also realized.

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.

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 belongs to the technical field of mobile power sources, and particularly discloses a portable power source. The portable power source comprises a casing, heat dissipation holes, four insulation frames, a power pilot light, a lithium battery, a cooling fin, a control panel and a power interface, wherein the heat dissipation holes are positioned in the lower bottom surface of the casing, the cooling fin is mounted at the bottom of the casing and is opposite to the heat dissipation holes, the insulation frames are respectively mounted at the four corners of the lower bottom surface of the casing, and the lithium battery is mounted at the middle position in the casing and is closely adhered to the cooling fin; the control panel is mounted at the upper part of the casing, the power pilot light and the power interface are welded to the control panel, and the power interface is exposed outside a side surface of the casing. Because a heat dissipation function is designed in the portable power source disclosed by the invention, the lithium battery with larger power and the more charging and discharging power can be accommodated, so that the higher cruising ability of electric quantity can be ensured and the portable power source has a higher practical value for a long-term journey and a long journey.

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 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 relates to a battery protection plate and a manufacturing method thereof, a battery and a terminal. The battery protection board comprises: a hard circuit board; the at least two connectors are respectively connected with the hard circuit board and an external charging and discharging circuit; the hard circuit board is provided with a battery cell connecting end which is used for being connected with a battery cell of a battery; and the at least two connectors are respectively connected with the battery core connecting ends on the hard circuit board through at least two groups of current paths. According to the scheme provided by the embodiment of the invention, charging and discharging shunting of the battery is realized through the at least two connectors and the at least two groups of current paths in the circuit board, so that the temperature rise is reduced while the charging power is improved.

The invention discloses a high-power annular energy storage battery. The high-power annular energy storage battery comprises several layers of annular walls which are coaxially sleeved together and made of solid electrolyte, the ends of the annular walls are fixed on an insulating round pedestal while the other ends are fixed on a round upper cover, all the annular walls, round pedestal and round upper cover jointly form several layers of closed cavities sleeved together, anode material and cathode material alternatively fill the spaces between adjacent closed cavities at intervals, and when the battery runs, both the anode material and cathode material are in the liquid state; anode current and cathode current are led from the bottoms of the closed cavities and respectively gathered to form an anode and a cathode of the battery. The high-power annular energy storage battery has large electro-chemical reaction area and current flow area and good electronic conductivity; the high-power annular energy storage battery is capable of providing a large enough current density to guarantee a high enough charging / discharging speed rate and power, and moreover, the high-power annular energy storage battery is simple in structure, low in cost, capable of confirming size parameters according to different capacity requirements, easy to expand scale and capable of meeting different capacity and space requirements.

The invention discloses an EDLC-based modular electric vehicle high-power energy storage and heat management system, which comprises a motor module, an integrated power supply distribution module, anenergy storage and power supply module and an external power supply. The motor module comprises a driving wheel and a motor, and the motor is used for mutual conversion between electric energy and kinetic energy; the integrated power supply distribution module comprises a first inverter, a power converter and a second inverter and is used for charging power conversion and mutual alternating current and direct current conversion; the energy storage and power supply module comprises a super capacitor, a lithium battery, a pump and a radiator and is used for storage, conversion and heat exchangeof electric energy. The system has the advantages that the super capacitor is used for replacing a common capacitor, the charging and discharging power is large, the energy density is not low, more energy can be recycled when an automobile is braked, electric energy conversion can be achieved in a balanced and efficient mode during acceleration, and the energy utilization efficiency of the systemis improved.

The invention discloses an electrode material, a battery and a preparation method for the electrode material, belonging to the field of batteries, which is a composite electrode material whose density is lower than that of an aqueous electrolyte, and which includes an electrode active material, a conductive material, and a binder And plastic foam, electrode active material has oxidation-reduction reaction activity, can contribute to battery capacity, conductive material has electronic conductivity, binder is used to bond different materials into a whole, and cannot block the aqueous electrolyte and electrode activity Material contact; plastic foam used to reduce the overall density of the composite electrode material. The invention also discloses a battery comprising the above-mentioned electrode material, which is automatically divided into three layers of positive electrode material-electrolyte-negative electrode material or three layers of negative electrode material-electrolyte-positive electrode material from top to bottom. In the battery of the present invention, there is no diaphragm between the positive and negative electrodes, and the electrolyte can flow between the positive and negative electrodes by stirring to promote ion conduction.