8results about How to "Increase charging voltage" patented technology

The invention discloses a positive and negative pulse formation process for prolonging the floating charge life of a medium-large-density lead storage battery, and belongs to the technical field of lead-acid storage battery formation. The formation process comprises the following steps: standing; carrying out constant-current charging; primary pulse charging and discharging; discharging at constant current; carrying out secondary pulse charging and discharging; discharging at constant current; carrying out tertiary pulse charging and discharging; carrying out constant-current charging; judging capacity; carrying out fourth pulse charging and discharging; and constant-current charging is stopped. The specific parameters of the positive and negative pulse charging and discharging process are as follows: the current rising slope is 90-110 A / s, the amplitude of the positive pulse is 0.30-0.50 C, and the width is 3-6 s; the current drop slope is 90-110A / s, the amplitude of the negative pulse is 0.20-0.40 C, and the width of the negative pulse is 1-3s. By utilizing a pulse formation process, electrochemical corrosion of the positive grid can be avoided, and the floating charge life of the battery is prolonged.

The present invention relates to the technical field of capacitor charging and discharging, and in particular to a high-power capacitor charging and discharging test system and a test method. The high-power capacitor charging and discharging test system comprises a charging and discharging platform and a monitoring platform, wherein the charging and discharging platform is electrically connected to the monitoring platform, wherein the charging and discharging platform comprises a charging unit and a discharging unit, wherein the monitoring platform comprises an on-site measurement and control platform, an audio and video monitoring unit and a remote monitoring terminal, wherein the monitoring platform is used to realize charging and discharging control, dynamic monitoring, data management and remote monitoring of a pulse capacitor (C1) under test. The present invention has the advantages of high charging voltage and power, high intelligence, high safety performance and high reliability.

This application relates to the field of charging technologies and discloses a charging circuit, a charging control method, and an electronic device, to perform overvoltage protection on a charging circuit in an electronic device. The charging circuit includes a first power supply terminal, a second power supply terminal, a controller, a first switch, a second switch, a first charging chip, and a second charging chip. The second charging chip supports a fast charging protocol. The first power supply terminal is coupled to the first charging chip through the first switch and coupled to the second charging chip through the second switch, and the first power supply terminal is configured to be coupled to a charger. The first charging chip and the second charging chip are further coupled to the second power supply terminal, to be coupled to a battery. The first charging chip is coupled to a communication terminal of the charger. The first charging chip communicates with the charger to determine that the charger supports the fast charging protocol. The controller controls the first switch to open and the second switch to close, and controls the first charging chip to obtain power from the battery. The first charging chip controls the charger to increase a charging voltage, to fast charge the battery.

This application discloses a supercharging power supply circuit and method for vehicles, belonging to the field of circuit technology. The battery pack module includes a low-voltage battery pack and a high-voltage battery pack, with rated voltages of a first voltage value and a second voltage value. When the first contactor group in the contactor module is open and the second contactor group is closed, branches formed by connecting each low-voltage battery pack in series with one high-voltage battery pack are connected in parallel to form a supercharging battery pack with a rated voltage equal to the sum of the first and second voltage values, entering supercharging mode. When the first contactor group is closed and the second contactor group is open, branches formed by connecting all low-voltage battery packs in series are connected in parallel with each high-voltage battery pack to form a normal battery pack with a rated voltage equal to the second voltage value, entering normal charging or power supply mode. In supercharging mode, the step-down module reduces the voltage of the supercharging battery pack to the second voltage value to supply power to high-voltage electrical appliances. This application enables the use of high-voltage electrical appliances when supporting supercharging, ensuring charging safety.

The invention relates to the technical field of electrolyte, in particular to an aromatic fluoronitrile electrolyte material, electrolyte and a battery. The aromatic fluoronitrile electrolyte material comprises aromatic hydrocarbon and substituted ether-containing groups, fluorine-containing groups and nitrile-containing groups, and the rest groups are selected from at least one of hydrogen groups, alkyl groups and alkenyl groups. The electrolyte material with high voltage resistance, high ionic conductivity and good long cycle performance is obtained through the combined action of the aromatic hydrocarbon structure fragment, the nitrile structure fragment, the fluorine structure fragment and the ether structure fragment, the variety of high voltage resistant fluoronitrile electrolytes is expanded, and the electrical performance of the fluoronitrile electrolytes is further improved. Meanwhile, the battery designed based on the electrolyte has higher safety performance and allows higher charging voltage, in addition, the fast charging capacity of the battery can be effectively improved by improving the ionic conductivity and reducing the interface resistance, and the cycle performance of the battery can be effectively improved by stable SEI film impedance.

The utility model discloses a charging circuit of a battery, and relates to the technical field of charging equipment, the charging circuit comprises a power supply circuit, the input end of the power supply circuit receives a power supply, and the output end of the power supply circuit is used for charging the battery; the control circuit is respectively connected with the power supply circuit and the detection feedback circuit, the detection feedback circuit is connected with and detects the charging voltage of the power supply circuit, and the control circuit detects the charging voltage of the power supply circuit through the detection feedback circuit; when the charging voltage exceeds a first preset threshold value, the control circuit controls the power supply circuit to reduce the output, and when the charging voltage is lower than the first preset threshold value, the control circuit controls the power supply circuit to increase the output; when the environment temperature rises, the control circuit controls the power circuit to reduce the output, and when the environment temperature drops, the control circuit controls the power circuit to increase the output. According to the invention, the charging electric quantity of the lead-acid battery in a low-temperature environment is more sufficient, and the lead-acid battery is prevented from being overcharged in a high-temperature environment.

The invention discloses a high-voltage lithium cobalt oxide positive electrode material and a method and application for improving the spin state of the high-voltage lithium cobalt oxide positive electrode material, and belongs to the technical field of battery preparation. The method specifically comprises the following steps: (1) preparing a lithium cobalt oxide coarse material, and then crushing and sieving the lithium cobalt oxide coarse material; and (2) collecting the sieved powder, and treating the powder by adopting at least two modes of magnetic field assistance, plasma treatment and calcination to prepare the high-voltage lithium cobalt oxide positive electrode material with a raised spin state. The high-voltage lithium cobalt oxide positive electrode material with high spin-state Co < 4 + > is prepared through cooperation of different treatment modes in magnetic field, plasma and sintering treatment, the coverage degree of lattice oxygen energy bands is improved, and lattice oxygen sites are anchored; the volume expansion of the lithium cobalt oxide is inhibited through a magnetostrictive effect, so that the arrangement of an ordered layered structure of the high-voltage lithium cobalt oxide positive electrode is realized; meanwhile, dissolution of Co < 4 + > can be inhibited in a high-voltage interval, and the defect that a material interface is unstable can be overcome.

The invention provides a battery charging and discharging circuit, a battery charging and discharging system and an electric automobile, after a control unit determines that each battery cell is normal, if a charging instruction is received and each parallel relay is judged to be non-adhesion, a first instruction is output; the series-parallel switching unit receives the first instruction and outputs a series signal to control each series relay to be closed and each parallel relay to be disconnected so as to charge each battery module in series; if the control unit receives the discharge instruction and judges that each series relay is not adhered, a second instruction is output; and the series-parallel switching unit receives the second instruction and outputs a parallel signal to control each parallel relay to be closed and each series relay to be disconnected so as to discharge each battery module in parallel. When the circuit is used for charging, a plurality of battery modules can be connected in series, the charging voltage is increased, the charging current is reduced, and the charging speed is improved; and during discharging, a plurality of battery modules can be connected in parallel, and the system voltage is reduced, so that the requirement on the voltage resistance of the whole vehicle can be reduced.