308results about How to "Small self-discharge" patented technology

The invention discloses a mixed positive electrode material, a positive plate using the same, and a lithium ion battery. The mixed positive electrode material comprises the following component by weight: 50-90 parts of a nickel-cobalt-manganese ternary material and 10-50 parts of lithium-manganese-iron phosphate. The mixed positive electrode material provided by the invention combines the nickel-cobalt-manganese ternary material with high energy density and lithium-manganese-iron phosphate with high safety performance, and plays complementary advantages of nickel-cobalt-manganese and lithium-manganese-iron phosphate, so that comprehensive performances of the positive electrode active material are improved. The positive plate prepared by using the mixed positive electrode material increases the safety performance and cycle performance of the lithium ion battery, increases average voltage of the lithium ion battery, and keeps relatively high energy density; and the lithium ion battery using the positive plate has excellent electrochemical performances, high energy density and high safety performances and long cycle life, and is suitable for popularization and application.

The invention provides a formula and preparation method of a high energy storage lead-acid battery lead paste and relates to the technical field of lead-acid batteries. The formula of a positive plate lead paste comprises the following raw materials: 7-8.5% of dilute sulphuric acid, 10.2-10.8% of deionized water, 0.2-0.4% of colloidal graphite, 0.8-2% of red powder, 0.06-0.09% of stannous sulfate, 0.05-0.08% of polyester staple fiber and the balance of lead powder; the formula of a negative plate lead paste comprises the following raw materials: 6.8-7.5% of dilute sulphuric acid, 9.8-10.8% of deionized water, 0.2-0.4% of acetylene black, 0.2-0.3% of humic acid, 0.8-1.0% of barium sulfate, 0.08-0.1% of barium stearate, 0.15-0.18% of sodium lignosulphonate, 0.06-0.09% of polyester staple fiber and the balance of lead powder. The battery prepared by the lead paste has the advantages of high initial capacity and long cycle life; and the overdischarge resistance and charge acceptance of the battery are higher than the standard requirements.

The invention discloses a preparation method of a nano-network conductive polymer coated lithium iron phosphate anode material. The preparation method is characterized in that: a surfactant is used as a template; and a conductive polymer monomer is subjected to in-situ polymerization on a lithium iron phosphate surface in a low-temperature acid solution medium and a nano-network structure is grown; and thus, the nano-network conductive polymer coated lithium iron phosphate anode material is formed. The special shape of the nano-network conductive polymer is favorable for a current carrier to be conducted among polymer aggregate particles; and the nano-network conductive polymer has high current carrier mobility ratio, and can effectively connect surfaces among lithium iron phosphate particles when coated on the lithium iron phosphate surface to form an effective conductive network, so the lithium iron phosphate conductivity is significantly improved, and the contact resistance and electrode polarization among the particles are reduced to ensure that the electrochemical performance of an electrode material is greatly improved. The preparation method has a simple process and readily-available raw materials, and is suitable for carrying out industrial large-scale production.

A provided high energy density lithium ion battery comprises a cathode piece, an anode piece, an isolated film, a positive pole lithium-supplementing layer, an electrolyte, a first polymer conductive layer disposed between the cathode piece and the positive pole lithium-supplementing layer, and a second conductive layer disposed between the positive pole lithium-supplementing layer and the isolated film; the cathode piece comprises a positive pole current collector and a positive pole film; the anode piece comprises a negative pole current collector and a negative pole film; and the positive pole film of the cathode piece at least comprises a first positive pole active material with high initial efficiency and a second positive pole active material with lithium-excessive-insertion resistance. The high energy density lithium ion battery is improved in initial efficiency and energy density of the lithium ion battery, and has lithium-excessive-insertion resistance; the high energy density lithium ion battery is capable of controlling the speed and the uniformity of lithium insertion when the positive pole lithium-supplementing layer supplements lithium for the cathode piece, and further protecting the cathode piece; and the high energy density lithium ion battery is capable of inhibiting penetration of the isolated film by residual metal particles after lithium supplement, and further reducing potential safety hazard.

The invention discloses a super-wide-temperature-range nickel-hydrogen battery. The battery comprises an iron shell as well as a nickel electrode, a hydrogen electrode, a diaphragm and an electrolyte solution mounted in the iron shell, wherein the nickel electrode takes foam nickel as a substrate material; the space in foam nickel is filled with a positive electrode active substance Ni(OH)2, a conductive agent, an additive and a binder; the hydrogen electrode takes a porous nickel-plated steel belt, a copper net or foam nickel as a substrate material; the porous nickel-plated steel belt, the copper net or foam nickel is coated with a negative electrode active substance, namely, hydrogen storage alloy powder, the conductive agent, the additive or the binder; and the electrolyte solution is a mixture of a potassium-rich alkaline aqueous solution and sodium tungstate or tungstic acid crystals. The invention furthermore discloses a manufacturing method for the super-wide-temperature-range nickel-hydrogen battery. According to the super-wide-temperature-range nickel-hydrogen battery disclosed by the invention, the ratio of 0.2C discharge capacity to normal-temperature capacity maximally can reach 70-80% in an environment with the temperature of -45 DEG C; and the ratio of 0.2C discharge capacity to normal-temperature capacity of the nickel hydrogen battery maximally can reach 85-95% in an environment with the temperature of 70 DEG C. Moreover, the manufacturing method is simple and suitable for large-scale production.

The invention discloses a lead-acid storage battery lead paste, comprising a positive lead paste and a negative lead paste, wherein the positive lead paste comprises the following components: regenerated lead powder, red lead, polytetrafluoroethylene, ultra-fine tetrabasic lead sulfate, sodium perborate, graphite, polyester staple fiber, glass fiber, antimonous oxide, dilute sulfuric acid and deionized water; and the negative lead paste comprises the following components: regenerated lead powder, red lead, barium sulfate, barium stearate, sodium lignosulfonate, humic acid, semi-carbonized wood chips, polyester staple fiber, modified graphene, dilute sulfuric acid and deionized water. According to the lead-acid storage battery lead paste disclosed by the invention, the problem of poor over-discharge performance and charge acceptance capability of a storage battery can be improved, and the service life of the storage battery can be prolonged.

The invention relates to a solar yard lamp device being convenient for cleaning solar panels and easy to adjusting lamp direction. The solar yard lamp device comprises a column arranged in the vertical direction, wherein the left side of the top of the column is provided with a box body through a rotary hinge structure and an automatic retractable adjusting mechanism; the top of the box body is provided with a heat insulation plate; solar panels are spread on the heat insulation plate; a storage battery, a voltage stabilizer, a remote signal receiver and an intelligent controller are arranged in the box body; the lower surface of a mounting plate is provided with a fixed block; a ball is rotatablely arranged in the fixed block; the bottom of the ball is connected with an LED (light-emitting diode) illuminating lamp through a connecting rod; an electric push rod is arranged between the mounting plate and the LED illuminating lamp; and the box body is provided with an automatic reciprocating wiping unit for wiping the solar panels. The solar yard lamp device can make automatic adjustment on the irradiation direction of the LED illuminating lamp according to the inclination angle of the solar panels so as to adapt to the lighting demands of the yard, and can automatically clean the solar panels; and the solar panels are integrally installed on the storage battery, thereby avoiding the exposure of the circuit, and prolonging the service life of the components.

The invention discloses a method for preparing an electronic ternary material precursor from Ni-Co residues. The method realizes combination of one or more physical and chemical methods. The method comprises the following steps of pre-treating Ni-Co-containing waste or waste residues so that Ni and Co are preliminarily separated from other substances, adjusting a mole ratio of Ni to Co in the Ni-Co-containing waste or waste residues to 1: (1-0.2), carrying out deep purification of other elements except Ni and Co by an extraction method, treating an Ni-Co group, carrying out separation purification to remove other impurities, wherein Ni and Co is not separated, and directly preparing the Ni-Co oxide precursor of the electronic ternary material by a metallurgical technology, and adding sodium carbonate or sodium hydroxide into a Ni and Co sulfuric acid solution to directly produce an Ni-Co carbonate or an Ni-Co hydroxide. An important characteristic or an innovation point of the method comprises that Ni and Co are combined in an ion level. The method improves environment influence, can produce a novel Ni-Co product and is conducive to resource recycle and environment-friendly development.

The invention provides a low self-discharge ferrous electrode material. The ferrous electrode material is characterized by consisting of an active substance and an additive, wherein the composition ofthe active substance is ferrum or ferrous compounds including one or more of Fe3O4, Fe(OH)2, Fe(OH)3, Fe2O3, reduced ferrous powder and carbonyl ferrous powder; and the additive comprises: 1) 0.02 to0.15 percent of indium or indium compounds including one or more of In, In2O3, In2(SO4)3, In(OH)3, InCl3 and the like; 2) 2 to 8 percent of stannum or stannum compounds including one or more of Sn, SnO, SnO2, SnCl2, SnCl4 and stannate; 3) 1 to 7 percent of bismuth or bismuth compounds including one or more Bi, Bi2O3, Bi(NO3)3 and the like; and 4) 5 to 10 percent of graphite powder. The ferrous electrode material has the advantages that: 1) no toxic heavy metals (such as Hg, Cd, Pb and the like) are added, so the electrode material is an environment-friendly electrode material 2) the cost foran electrode is quite low; and 3) the self-discharge rate of the electrode is less than 20 percent at a temperature of 20 DEG C after 28 days. The material is used for manufacturing environment-friendly ferrum-nickel storage batteries.

The invention relates to A2B7 type RExYnNiz-a-bMnaAlb hydrogen storage alloy. The alloy is good in pressure-composition-isothermality, and has a maximum hydrogen storage amount of up to more than 1.36 wt.% under usual conditions. The alloy of the invention has better electrochemical performance as a hydrogen storage electrode and better gas-phase hydrogen absorption and desorption performance as a hydrogen storage material than traditional LaNi5 type hydrogen storage alloy; the alloy contains no magnesium element in the composition, so the preparation method of the alloy is simple and safe when compared with that of traditional rare earth-magnesium-nickel-based A2B7 type hydrogen storage alloy.

A copper nickel statical single fluid stream battery is composed of a battery pile coupled by multi-section of battery monomers, electrolyte, a battery container and a sediment tank, wherein the battery monomers comprise a nickel electrode anode, a cathode current collector of the sediment zinc, a baffle plate and a liquid injection cover. The cathode active materials are dissolved and stored in the electrolyte, and two battery monomers of the series battery pile are connected in series by the positive and negative electrode connectors. In the charging and discharging processes, the active material dissolvable zinc salt in the electrolyte is converted with the metallic zinc on the cathode current collector backwards and forwards. The invention eliminates the solution storage tank and the liquid pump in the traditional fluid stream battery, realizes the dynamic loop of the active materials in the inner of the battery electrolyte, with small volume, high working pressure, long service life, convenient carrying, which is suitable to be used as the movable power with low cost.

The invention provides a diaphragm for a full-vanadium ionic liquid flow battery. The diaphragm for the full-vanadium ionic liquid flow battery comprises a porous composite membrane and water-soluble metal salt attached into pores of the porous composite membrane, wherein the porous composite membrane has cation exchange function, and the ion exchange capacity of the porous composite membrane is not less than 0.56mmol H+/g. The invention also provides a preparation method for the diaphragm for the full-vanadium ionic liquid flow battery. The method comprises a step of attaching the water-soluble metal salt attached into the pores of the porous composite membrane, wherein the porous composite membrane has cation exchange function, and the ion exchange capacity of the porous composite membrane is not less than 0.56mmol H+/g. The invention also provides the full-vanadium ionic liquid flow battery comprising the diaphragm for the full-vanadium ionic liquid flow battery. The diaphragm for the full-vanadium ionic liquid flow battery reduces the vanadium ion penetration rate and the water migration rate at the same time of ensuring enough proton exchange rate, so the diaphragm has more stable electrochemical performance such as circular charging and discharging performance.

The invention discloses a solar street lamp apparatus having a solar cell panel capable of self-cleaning and easily-adjustable inclination angles. The apparatus includes an electric pole which is arranged in a vertical direction. The left side of a top part of the electric pole is provided with a box body through a rotary hinging structure and an automatic telescopic adjusting mechanism. The rotary structure is arranged above the automatic telescopic adjusting mechanism. The top part of the box body is provided with a thermal insulation board which is provided with a solar cell panel thereon. The box body is provided with a storage battery pack, a LED lamp module, a voltage-stablizer, a remote signal receiver and an intelligent controller having the timing keeping and time setting functions therein. The side part of the box body is provided with a radiating hole. The radiating hole is provided with a water-resisting and ventilated membrane therein. The box body is provided with an automatic reciprocating wiping apparatus which is intended for wiping the upper surface of the solar cell panel. According to the invention, the apparatus can automatically adjust the inclination angles of the solar cell panel based on the radiation angles of the sun, fully increases photovoltaic conversion rate, can automatically clean the solar cell panel, and since the solar cell pane and the storage battery are integratedly mounted, the apparatus has strong reliability, has time keeping and time setting functions, and avoids waste of electricity.

The invention discloses an electrolyte used for an ion state mixed crystal salt storage battery. The electrolyte comprises the following components in percentage by weight: 52-80% of hydrosulphate, 0.1-8% of corrosion inhibitor, 0.4-3% of antiager, 3-12% of strong acid salt agent, 0.1-10% of ester ion concentration control agent, 1-13% of lead-acid storage battery activating agent, 1-10% of chemically pure sulfuric acid of which the concentration is larger than or equal to 98%, and the balance of distilled water. The electrolyte disclosed by the invention has the advantages that the environment pollution caused by sulfuric acid in the electrolyte of the existing lead-acid storage battery is effectively avoided, a system is enabled to have stable and mild reactivity, the stable electrochemical performance of the storage battery is improved, the high and low ambient temperature adaptability is strong, the effective discharge capacity and the self discharge rate are small, and the service life of the battery can be effectively prolonged.

The invention discloses a preparation method of a low self-discharge nickel-metal hydride battery. The preparation method comprises steps as follows: preparation of a semi-finished product of a positive pole, preparation of a semi-finished product of a negative pole, preparation of glue for soaking bottom ends of the positive pole and the negative pole, soaking, electrolyte preparation, assembly and the like. According to the preparation method of the low self-discharge nickel-metal hydride battery, a positive pole substrate adopts foamed nickel, positive pole substances comprise a spherical nickel hydroxide active substance, a conductive agent, a bonding agent and an additive, the additive comprises cobalt monoxide and cobaltous hydroxide, the electrolyte is ternary electrolyte comprising potassium hydroxide, sodium hydroxide and lithium hydroxide, and further, a positive plate adopts a bottom gumming technology and diaphragm paper for a bottom welding technology during a manufacturing process, so that positive powder is prevented from falling to the bottom of a steel shell and is contacted with the negative pole, and self-discharge of the battery is reduced; and the test proves that the electrical charge retention rate of the battery prepared with the preparation method can still be higher than 88% after stored for two years at the normal temperature of 25 DEG C.

The battery consists of anode, diaphragm, electrolyte and cathode. The active material of the anode is composed of spherical Ni(OH)2 grains and oxide additive of transition metal. The active materialof the cathode is composed of the additive C60, BN or transition metal oxide and AB3 type hydrogen stored alloy. In formula AB3, A includes at least two elements among mixed rare earths Mm, Ca, Mg, Ti, and B includes at least three elements among Ni, Co, Mn, Cu and Al. spherical Ni (OH) 2 anode material with small expansion, high temperature resistant and high utilization ratio is prepared by using the crystal growth method of chemical deposition. The hydrogen stored alloy with high capacity, large hydrogen diffusion coefficient as well as antioxidant and anticorrosion, low self-discharge and long service life. The battery is suitable for large scale of production.

Formula of the restoring agent includes following materials and mass percent: potassium sulfate 3-9%; sodium sulfate 4-8%; potassium bicarbonate 0.5-2%; potassium carbonate 1-3%; sodium silicate 0.2-0.8%; potassium acid phthalate 0.015-0.06%; aluminum powder 0.005-0.02 etc and deionized water as surplus. Using quite active metallic ions in the restoring agent to replace quite inert lead ions in crystal of lead sulfate, the method ionizes and hydrolyzes lead sulfate to the sulfate ions and lead ions, which take part in normal electrochemical reaction of lead acid battery again. At the same time, matter in the restoring agent together with quite active metallic ions, which accomplishes replacement, forms stable salt so as to reduce self-discharge inside battery caused by harmful metal ions to retain capacity for long time. The invention restores capacity of accumulator effectively, and lightens environmental pollution from old accumulators.

The invention provides gelled electrolyte of a vanadium battery and the vanadium battery employing the gelled electrolyte. The gelled electrolyte comprises sulfuric acid, vanadyl sulfate, gelatin and an additive, wherein the additive comprises one or more of silicon dioxide, sulfate of alkali metal and/or alkaline earth, glycerol, salt of metal indium, and C1-C4 ammonium ethoxylated alkyl sulfate. The gelled electrolyte can weaken the migration of water along with protons on two sides of a diaphragm of the vanadium battery to ensure that the phenomenon of unbalanced concentration and volume of electrolyte ions at positive and negative poles is improved, and also can weaken the migration of vanadium oxide ions along with the protons on the two sides of the diaphragm of the vanadium batteryto ensure that the self discharge of the vanadium battery is reduced; therefore, the cyclical stability of the vanadium battery can be improved, and the capillary seepage phenomenon of the electrolyte along with the diaphragm is stopped so as to avoid leakage.

The battery is composed of anode of composite oxides containing lithium, cathode of carbon material with lithium being embedded, winded diaphragm of polyethylene, and injected electrolyte. Characters are that inorganic oxide coating is painted on surface of cathode. Mixing inorganic oxide and cementing material prepare the inorganic oxide coating. The specific producing steps are as following: stirring inorganic oxide and cementing material for 2-4 hours in even rate; painting the admixture onto surface of the cathode evenly; standing for 30-60 seconds, and drying at 80-110 deg.C. The invention reduces reaction between surface of active electrode and electrolyte, and self-discharge. Especially, when inner diaphragm is melted caused by abuse and high temperature, the inorganic oxide coating plays good insulation effect so as to reduce opportunity of short circuit, and raise safe reliability effectively.

The invention discloses a thermal battery positive electrode material and a preparation method thereof. Tungsten (molybdenum) metal ions are used as a positive electrode material of an electron acceptor; the main components of the positive electrode material comprise tungsten (molybdenum) sulfide, an additive, an electronic conductive agent, an ion conductive agent and a binder; through steps of ahigh-temperature roasting process, a vacuum-atmosphere replacement roasting process, an additive passivation treatment process, a mechanical activation roasting process, a crushing, sieving and packaging process and the like, the contents of volatile and decomposed impurities are reduced, the stability of the positive electrode material is improved, and the battery safety is improved. The positive electrode material disclosed by the invention is good in thermal stability, high in material utilization rate, small in self-discharge, large in output capacity and long in working time, and is an ideal positive electrode material of a high-capacity long-time thermal battery.