56results about How to "Stable charging and discharging" patented technology

A battery control unit (400) controls charge and discharge of battery cells (100) on the basis of temperatures measured by a temperature measurement unit (320) and voltages measured by the voltage and current measurement unit (340). In addition, the battery control unit (400) specifies a lowest temperature cell having the lowest temperature and a highest temperature cell having the highest temperature on the basis of the temperatures measured by the temperature measurement unit (320), when a current is greater than 0. In addition, the battery control unit (400) performs balance control for equalizing voltages of all the battery cells (100), on the basis of the voltages measured by the voltage and current measurement unit (340), when a first temperature condition in which a temperature difference ΔT between the highest temperature cell and the lowest temperature cell is equal to or greater than a reference value T₁ is not satisfied. On the other hand, when the temperature difference ΔT satisfies the first temperature condition, the battery control unit (400) does not perform the balance control.

The invention provides a formation method of a soft package lithium ion battery, and belongs to the technical field of lithium ion battery manufacturing. By the formation method, the problems that howgas in the soft package lithium ion battery is effectively discharged and the formation of a more compact and stable SEI film is facilitated are solved. The formation method of the soft package lithium ion battery comprises the steps of performing pre-charging formation, secondary vacuumizing and small-current charging formation on the lithium ion battery, before pre-charging formation, performing primary vacuumizing on the lithium ion battery subjected to liquid injection and being immersed at a normal temperature to preset vacuum, performing vacuum thermal package, performing primary front-surface and back-surface rolling on the lithium ion battery after vacuum hot sealing by a rolling device, performing high-temperature immersion, reducing a temperature to a room temperature, and performing secondary front-surface and back-surface rolling on the lithium ion battery after vacuum hot sealing by a rolling device between secondary vacuumizing and small-current formation. By the method,the more compact and stable SEI film is formed on a surface of a lithium ion battery negative electrode in a high-energy consumption mode in a more stable and safer environment, so that the performance of all aspects of the lithium ion battery is improved.

The invention discloses a preparation method of different morphologies of cobalt monoxide nanometers loaded with foam nickel. The preparation method comprises: placing sheet-like foam nickel in an ultrasonic washing machine, washing, placing the washed foam nickel in a drying box, and drying; dispersing cobalt chloride hexahydrate powder into a dispersion solvent added with urea, and magneticallystirring at a room temperature to form a suspension; transferring the suspension to a high-pressure hydrothermal reaction kettle, obliquely placing the dried sheet-like foam nickel into the high-pressure hydrothermal reaction kettle, sealing the high-pressure hydrothermal reaction kettle, placing the high-pressure hydrothermal reaction kettle into the drying box, carrying out thermal insulation for 15-18 h at a temperature of 160-200 DEG C, and naturally cooling to a room temperature; taking the foam nickel out of the high-pressure hydrothermal reaction kettle, placing into the ultrasonic washing machine, washing, placing into a vacuum drying box, and drying to obtain a precursor; and calcining the precursor for 3-4 h at a calcination temperature of 400-520 DEG C.

The invention belongs to the field of lithium batteries and relates to a composite lithium metal negative pole and a preparation method thereof. According to the preparation method, metal lithium is heated to a molten state in an argon-shielded glove box; a three-dimensional carbon sheet is made to contact with the molten lithium; after the three-dimensional carbon sheet is completely impregnatedby the metal lithium, the three-dimensional carbon sheet is taken out and is cooled to room temperature, so that the composite lithium metal negative pole is obtained. According to a three-dimensionalcarbon current collector, natural biomass catkin is used as a raw material; the natural biomass catkin is subjected to suction filtration and carbonization treatment, so that the three-dimensional carbon sheet is obtained; the carbonized catkin contains a large number of heteroatoms (mainly N and O), meanwhile, a hollow tubular structure is reserved; and the molten metal lithium can be easily injected into the whole three-dimensional network through capillarity; and the formed three-dimensional conductive carbon frame and rich space not only induce the uniform deposition of lithium, but alsocan adapt to volume change, so that the stable lithium metal negative pole can be obtained.

The invention relates to the technical field of battery materials, in particular to a binary transition metal oxide and graphene oxide composite material, a preparation method thereof and a sodium ionbattery. According to the preparation method of the binary transition metal oxide and graphene oxide composite material, Prussian blue analogue is grown in situ on the surface of the graphene oxide after a hydrothermal reaction, so that the Prussian blue analogue is more tightly combined with the graphene oxide, and then the battery is more stable in the charging and discharging process, so thatthe electrochemical performance of the graphene oxide composite material is improved. After the graphene oxide is subjected to the hydrothermal reaction, three-dimensional graphene oxide is obtained,so that the specific surface area of the composite material is increased, and therefore the volume expansion of the binary transition metal oxide is effectively relieved, meanwhile, agglomeration of the binary transition metal oxide is effectively prevented, and the electrical conductivity and the cycling performance of the composite material are improved.

The invention relates to a high-temperature-resistant and high-voltage-resistant composite lithium cobalt oxide positive electrode material which is of a multi-layer structure and sequentially comprises a metal element doped particle inner core, an interface transition layer and an amorphous phosphate coating layer from inside to outside. The preparation method comprises the following steps: carrying out a co-precipitation reaction on a Co aqueous solution, an Ma aqueous solution and a carbonate solution to obtain Ma element doped cobalt carbonate; carrying out ball milling on the Ma element doped cobalt carbonate and an Ma compound, and calcining to obtain an Ma element doped cobaltosic oxide precursor; mixing the Ma element doped cobaltosic oxide precursor with a lithium source, and calcining to obtain an Ma element doped lithium cobalt oxide material; and carrying out ball milling on the Ma element doped lithium cobalt oxide material, phosphate and absolute ethyl alcohol, and calcining to obtain the high-temperature-resistant and high-voltage lithium cobalt oxide positive electrode material. The interface transition layer can enhance the connection between the coating layer and the inner core and improve the lattice stability of the interface.

The invention belongs to the field of flexible batteries, and relates to a flexible battery electrode and a manufacturing process thereof. The surface of a first electrode of the electrode is providedwith an irregular convex structure, and the surface of a second electrode is provided with a layer of solid electrolyte; the convex structure on the first electrode and the solid electrolyte on the second electrode are embedded with each other and are fastened and combined with each other. According to the method, the two poles of the fibrous flexible battery can be tightly connected, it is ensured that the two poles of the fibrous flexible battery are tightly bonded all the time in the bending process of the flexible device, and the flexible battery prepared through the method has more excellent flexibility and electrochemical performance.

The electrochemical device according to the present invention is characterized by comprising: a positive electrode having a positive electrode material layer containing a conductive polymer doped witha first anion and a second anion; a negative electrode having a negative electrode material layer that occludes and releases lithium ions; and a nonaqueous electrolytic solution having lithium ion conductivity, wherein the second anion is more easily expelled from the conductive polymer than the first anion, respective mole numbers M1 and M2 of the first and second anions with which the conductive polymer is doped at a charge end stage satisfy a relationship of M1<M2, and respective mole numbers M3 and M4 of the third and fourth anions with which the conductive polymer is doped at a dischargeend stage satisfy a relationship of M3>M4.

The invention relates to a defibrillation energy storage capacitor and a charging circuit. A storage battery is sequentially connected with the charging circuit and a low-voltage energy storage capacitor. A first interface of a PWM chip IC1 of the charging circuit, a resistor R2 and a fourteenth interface of the IC1 are connected in series. A first interface of the IC1, the capacitor C1, the resistor R1 and a twelfth interface of the IC1 are connected in series; one path between the C1 and the R1 is connected with a 13th interface of the IC1; one path is connected with a capacitor C2 and thenconnected with a tenth interface of the IC1, and the other path is grounded; one path of a ninth interface of the IC1 is connected with a sixth interface of the IC1, one path is grounded after being connected with a capacitor C3, and one path is connected with a third interface of the dual operational amplifier IC2; an eighth interface of the IC1 is connected with a first interface of the IC2, a fourth interface of the IC2 is grounded, the eighth interface of the IC2 is connected with 12V, the fourth interface of the IC2 is respectively connected with the resistor R4 and the resistor R5, and afifth interface of the IC1 is connected with a seventh interface of the IC1 in series. Safety is guaranteed, waiting is not needed, stable and repeated charging and discharging can be achieved, the economic effect is good, and power consumption is reduced.

The invention provides an anion doped high voltage charge and discharge lithium vanadium phosphate cathode material and a preparation method thereof. The preparation method comprises the following steps: putting raw materials into a reaction vessel, adding water and stirring until all the raw materials are fully dissolved, and regulating pH value of the solution with ammonia water; heating in water bath directly, drying excessive moisture by distillation and forming a sol-like substance, and drying; then putting into a tube furnace, pre-sintering for 1-4 hours, and removing impurities; and grinding and tabletting the product, and then calcining for 4-12 hours, and naturally cooling to room temperature, thus the cathode material is obtained. The preparation method is succinct in steps and easy to operate, experimental conditions are simple and controllable, requirements on experimental apparatus are low, and the obtained bromine-doped lithium vanadium phosphate cathode material has better multiplying power and cycle performance during high voltage charge and discharge and has a broader application prospect in the aspect of power batteries.

The invention relates to the field of automobile parts and particularly relates to a vehicle-mounted GPS system. The vehicle-mounted GPS system comprises a GPS positioning module, at least one thermoelectric power generation plate used for power generation, an energy storing device used for storing power, a power supply device used for supplying power for the GPS positioning module, a clamping device used for clamping and a mounting base used for mounting the thermoelectric power generation plate, wherein both the energy storing device and the power supply device are mounted on the mounting base, and the power supply device is electrically connected with the energy storing device and the GPS positioning module; and the mounting base is annularly arranged at the outer side of a clamping plate, and the thermoelectric power generation plate is mounted between the mounting base and the clamping plate. The vehicle-mounted GPS system does not need to be connected into an automobile circuit, so that the damage of the automobile circuit due to too large load is prevented, the safe running of an automobile is ensured, and energy saving and environmental protection are facilitated.

The invention discloses a wireless charging and discharging system and method for an electric automobile. The system comprises a charging vehicle for providing electric energy and a power receiving vehicle for receiving the electric energy, wherein the charging vehicle and the power receiving vehicle are respectively provided with a wireless communication module and a wireless charging/dischargingmodule; the system further comprises a cloud server. The cloud server sends corresponding wireless charging/discharging instruction information to the charging vehicle and the power receiving vehicleaccording to the current vehicle condition information of the charging vehicle and the power receiving vehicle; and the charging vehicle and the power receiving vehicle respectively perform wirelessdischarging and wireless charging according to the corresponding wireless charging/discharging instruction information. According to the wireless charging and discharging system and method for the electric automobile, it can be guaranteed that the electric automobile can be safely and stably charged in the advancing process under the condition that a power source is lacked, power source supply isfacilitated, traffic jam is reduced, and great comfort and convenience are brought to traveling.

The invention discloses an electrolyte regulation method and system and a flow battery energy storage system. The electrolyte regulation method is suitable for a flow battery energy storage device. The flow battery energy storage device comprises an electrolyte storage tank and a battery stack device. The battery stack device is formed by connecting a plurality of liquid path pipelines in parallel, and each liquid path pipeline communicates the electrolyte of a plurality of battery stacks in series. The method comprises the following steps: determining the state-of-charge value of the electrolyte in the battery stack device; if the state-of-charge value of the electrolyte in the battery stack device is within a first preset range, determining a target electrolyte flow conveyed to the battery stack device by the electrolyte storage tank; and regulating the flow battery energy storage device to a target state according to the target electrolyte flow. According to the application, the problem that the flow of the battery stack liquid paths cannot be controlled and the stable charging and discharging of the system cannot be realized for an energy storage device in which a plurality ofbattery stack liquid paths are connected in series on liquid flow pipelines connected in parallel in the related technology is solved.

The invention discloses a power safety inspection system based on a wearable device. The system comprises a safety helmet, a flashlight and a remote monitoring terminal. The safety helmet includes a helmet body; and a control chamber is arranged at the rear end of the helmet body. A main control module, a positioning module, a human body monitoring module, an alarm module, and a wireless communication module are arranged in the control chamber; the positioning module, the human body monitoring module, the alarm module and the wireless communication module are connected with the main control unit respectively electrically; and the wireless communication module is in communication with the remote monitoring terminal. The safety helmet is used for storage and transmission of the inspection information of electric equipment to guarantee the personal safety of the inspection personnel. The flashlight is used for collecting equipment information and serves as inspection lighting equipment. The remote monitoring terminal is used for realizing centralized management of data, fault warning and centralized management of the operators. According to the inspection line equipment information, an inspection strategy is made, so that the labor intensity of the inspection personnel is reduced and the inspection efficiency is improved.