55results about How to "Increase depth of discharge" patented technology

In an electric power storage system according to the present invention, in the case of charging, a plurality of capacitors of each circuit block of the electric power storage system are switched to a serial connection to initiate the charging. When the output voltage of power storage means reaches the maximum input voltage of DC-AC conversion means, each capacitor of a number j of circuit blocks is switched to a parallel connection in order of higher block voltage. Also up to the time when the maximum input voltage is reached again, each capacitor of a number j of circuit blocks is switched to a parallel connection in order of higher block voltage. In the case of discharging, pluralities of capacitors of each circuit block of the electric power storage system are switched to a parallel connection to initiate the discharging. When the output voltage of power storage means reaches the minimum input voltage of DC-AC conversion means, each capacitor of a number k of circuit blocks is switched to a serial connection in order of higher block voltage. Also up to the time when the minimum input voltage is reached gain, each capacitor of a number k of circuit blocks is switched to a serial connection in order of higher block voltage. Accordingly, the electric power storage system is hardly affected by the capacitance error of the capacitors, and charging / discharging efficiency can be improved.

The invention discloses a negative plate of a lead acid super battery, a production method and a lead acid super battery assembled by the negative plate, solving the problem of short service life of the charge state of a magnifying power part of the traditional lead acid super battery. The negative plate comprises a negative plate grid and negative lead plaster, wherein capacitance carbon plaster is coated on the surface of the negative lead plaster, and expansion intermediate phase carbon microballoons are added to the negative lead plaster; and the capacitance carbon plaster comprises activated carbon loading lead oxide, stearic acid, acetylene black, and the like. In the invention, the negative plate is formed by the method that the materials of the negative lead plaster are coated onto the negative plate and after cured and formatted, the capacitance carbon plaster is coated onto the outer surface and cured; and a super capacitive negative plate is obtained by doping high-capacitance and high-conductivity expansion intermediate phase carbon microballoons into the negative lead plaster to match with active substances in the capacitance carbon plaster. The service life of the assembled lead acid super battery is prolonged by 3-5 times compared with that of the traditional lead acid super battery, and the power is improved by 5 times, thus the lead acid super battery can be applied to medium and low hybrid electric vehicles and low-configuration pure electric vehicles.

In an electric power storage system according to the present invention, in the case of charging, a plurality of capacitors of each circuit block of the electric power storage system are switched to a serial connection to initiate the charging. When the output voltage of power storage means reaches the maximum input voltage of DC-AC conversion means, each capacitor of a number j of circuit blocks is switched to a parallel connection in order of higher block voltage. Also up to the time when the maximum input voltage is reached again, each capacitor of a number j of circuit blocks is switched to a parallel connection in order of higher block voltage. In the case of discharging, pluralities of capacitors of each circuit block of the electric power storage system are switched to a parallel connection to initiate the discharging. When the output voltage of power storage means reaches the minimum input voltage of DC-AC conversion means, each capacitor of a number k of circuit blocks is switched to a serial connection in order of higher block voltage. Also up to the time when the minimum input voltage is reached gain, each capacitor of a number k of circuit blocks is switched to a serial connection in order of higher block voltage. Accordingly, the electric power storage system is hardly affected by the capacitance error of the capacitors, and charging / discharging efficiency can be improved.

An electrode material for a battery or for a capacitor, supercapacitor or a pseudo capacitor comprises a porous substrate coated with a coating comprising a conducting material and an active material, wherein the thickness of the coating is less than 1 micrometre and the volume fraction of active material is greater than 5%. In another aspect, the electrode material comprises a metallic network structure and an active material connected to the metallic structure, wherein the calculated volume fraction of active material is greater than 5%, and the surface area of the material is greater than 5 m2 / g.

The invention discloses a method for preparing a nickel positive electrode of a nickel-metal hydride secondary battery by using cobalt-aluminum hydrotalcite. The method is characterized by comprising the following steps: a, mechanically mixing 30-40 parts by weight of cobalt-aluminum hydrotalcite, 50-60 parts by weight of nickelous hydroxide, 5-10 parts by weight of conductive agents to obtain a nickel-metal hydride battery positive electrode material mixture; b, adding dispersing agent solutions into the positive electrode material mixture in the step (a); ball-milling and adding adhesives for performing ball-milling for 3-5 hours to obtain a nickel positive electrode material with uniform mixing; and c, uniformly tabletting the nickel positive electrode material in the step (b) on current collector foam nickel and drying at the temperature of 60-200 DEG C, and cutting to obtain nickel positive electrode pole pieces. According to the nickel electrode of the nickel-metal hydride secondary battery, cobalt-aluminum hydrotalcite is used as an additive, the performance of the battery can be obviously improved, the capacity density and the power density of the battery can be improved, the charging / discharging cycle life of the battery is prolonged, the over-charging resistance capability is improved, and the self-discharging is reduced.

A battery on a conductive metal wire and components of a battery on a conductive metal wire of circular cross section diameter of 5-500 micrometers and methods of making the battery and battery components are disclosed. In one embodiment, the battery features a porous anode or cathode layer which assist with ion exchange in batteries. Methods of forming the porous anode or cathode layer include deposition of an inert gas or hydrogen enriched carbon or silicon layer on a heated metal wire followed by annealing of the inert gas or hydrogen enriched carbon silicon layer. Energy storage devices having bundles of batteries on wires are also disclosed as are other energy storage devices.

The present invention provides a nickel-zinc secondary battery, including: a battery case; an electrode assembly, disposed in the battery case; and an electrolyte solution, positioned in the battery case, and filled around the electrode assembly, wherein the electrode assembly includes a nickel positive electrode, a zinc negative electrode, and a membrane separator disposed between the nickel positive electrode and the zinc negative electrode; the nickel positive electrode includes: a substrate and positive electrode material coated on the surface of the substrate; the positive electrode material includes: 68 wt %˜69 wt % positive electrode active material, 0.6 wt %˜1 wt % yttrium oxide, 0.2 wt %˜0.6 wt % calcium hydroxide, 3.5 wt %˜4 wt % nickel powder, and a binder in balance; and the positive electrode active material is a spherical nickel hydroxide coated with Co3+. The nickel-zinc secondary battery provided by the present invention can reduce the amount of hydrogen evolved and have good cycling performance while maintaining the battery capacity. The present invention further provides a method for preparing a nickel-zinc secondary battery.

The invention discloses a lithium ion battery assembling method which comprises the following steps that (1) single lithium ion batteries are subjected to a small-current capacity test and a large-current capacity test one time respectively, testing data C2 and C2 are stored, R is defined as the large-current charging ability and is equal to C2 / C1, the R value is calculated, and cells with abnormal R values are picked out; (2) the remaining qualified single batteries after selection are stored in a fully-charged mode and then is charged, and battery classification is carried out according to the charging capacities; (3) single batteries in the same charging capacity level form S-series P-parallel battery packs according to large-current capacity through the assembling method that high-capacity batteries are matched with low-capacity batteries. By means of the method, through simple operation, consistency of module capacity and self-discharging in the battery packs is effectively achieved.

The invention belongs to the technical field of aqueous zinc ion batteries, and particularly discloses a three-dimensional current collector / Zn / Zn-E composite negative electrode which comprises a three-dimensional current collector substrate, a zinc body layer deposited on the surface of the three-dimensional current collector substrate and a Zn-E alloy layer deposited on the zinc surface. In addition, the invention also discloses a preparation method of the negative electrode and an application method of the negative electrode in an aqueous zinc ion battery. The composite zinc negative electrode has high utilization rate, the energy density of the battery is greatly improved, and the assembled aqueous zinc ion total battery has excellent cycle and rate performance. In addition, the preparation method is simple, efficient and low in cost, and further application of the water-based zinc ion battery is promoted.

The invention discloses a lithium ion battery assembling method which comprises the following steps that (1) single lithium ion batteries are subjected to a small-current capacity test and a large-current capacity test one time respectively, testing data C2 and C2 are stored, R is defined as the large-current charging ability and is equal to C2 / C1, the R value is calculated, and cells with abnormal R values are picked out; (2) the remaining qualified single batteries after selection are stored in a fully-charged mode and then is charged, and battery classification is carried out according to the charging capacities; (3) single batteries in the same charging capacity level form S-series P-parallel battery packs according to large-current capacity through the assembling method that high-capacity batteries are matched with low-capacity batteries. By means of the method, through simple operation, consistency of module capacity and self-discharging in the battery packs is effectively achieved.

The invention discloses a zinc ion battery, comprising a positive electrode, a negative electrode and an electrolyte, the positive electrode includes α-MnO 2 / carbon nanotube composite material, the negative electrode includes zinc / carbon nanotube foam composite material, and the electrolyte contains soluble zinc salt and soluble manganese salt. The zinc ion battery that the embodiment of the present invention provides adopts α-MnO 2 / carbon nanotube composite material as the positive electrode and zinc / carbon nanotube foam composite material as the negative electrode, which overcomes the problem of dendrite growth in the cycle process of the traditional zinc negative electrode, greatly improves the cycle life and stability of the battery, and the present invention implements The zinc ion battery provided by the example can maintain a high specific capacity at a high rate, greatly improve the cycle life of the battery, and realize a long cycle at a high rate.

The invention discloses a control method for improving discharging depth of a flywheel energy storage device under a microgrid. The control method comprises the following steps of selecting a mathematic model of a flywheel motor accessed to the microgrid; simplifying a rotational speed of the flywheel motor and an output voltage of the flywheel motor as a direct proportion relation, wherein a proportion coefficient is set as k; obtaining an output voltage, after being rectified, of the flywheel motor according to the proportion coefficient and the rotational speed of the flywheel motor, namely, an input voltage U<in> of a Cuk circuit; obtaining an output voltage U<o> after voltage conversion on the input voltage of the Cuk circuit by the Cuk circuit; obtaining an expression of a control signal u of a pulse width modulation (PWM) controller according to a running principle of the PWM generator for generating the control signal, the input voltage U<in> of the Cuk circuit and the output voltage U<o> after voltage conversion of the Cuk circuit; and finally, adding a proportion integration differentiation (PID) control module. By rotational speed tracking of the flywheel motor and combined control of PID, deep discharging of flywheel energy storage can be ensured, and rapid response and stable voltage of flywheel energy storage can also be ensured.

The invention provides compound cathode slurry of graphene high-power lithium batteries, relates to the technical field of cathode slurry of lithium batteries and aims to solve the technical problems that cathode slurry used in the prior art causes reduced energy storage capacity and poor cycle performance and stability of the lithium batteries, as a result, the lithium batteries easily heat and are short in service life and low in utilization rate during usage. Thus, the invention provides the compound cathode slurry of graphene high-power lithium batteries. Compared with traditional cathode slurry for the lithium batteries, the prepared compound cathode slurry has the battery capacity reduced from 195.256 mAh / g to 193.658 mAh / g and the capacity retention rate up to 99.18% under the conditions that the temperature is 35 DGE C and 1C charge and 6C discharge are circulated 500 times, the discharge specific capacity and attenuation resistance are improved, and the high cycle life and high capacity stability are realized.

The present invention provides a nickel-zinc secondary battery, including: a battery case; an electrode assembly, disposed in the battery case; and an electrolyte solution, positioned in the battery case, and filled around the electrode assembly, wherein the electrode assembly includes a nickel positive electrode, a zinc negative electrode, and a membrane separator disposed between the nickel positive electrode and the zinc negative electrode; the nickel positive electrode includes: a substrate and positive electrode material coated on the surface of the substrate; the positive electrode material includes: 68 wt %˜69 wt % positive electrode active material, 0.6 wt %˜1 wt % yttrium oxide, 0.2 wt %˜0.6 wt % calcium hydroxide, 3.5 wt %˜4 wt % nickel powder, and a binder in balance; and the positive electrode active material is a spherical nickel hydroxide coated with Co3+. The nickel-zinc secondary battery provided by the present invention can reduce the amount of hydrogen evolved and have good cycling performance while maintaining the battery capacity. The present invention further provides a method for preparing a nickel-zinc secondary battery.