36results about How to "Improve mass to energy" patented technology

The invention discloses a thermal management system of an electric automobile, comprising a temperature sensor, a heating and cooling device and a central processing unit, wherein the temperature sensor is used for acquiring the temperature of components generating the raising and the drop of temperature in the electric automobile; the heating and cooling device is used for generating a heat source and a cold source which are transmitted to components needing heating and cooling and is connected with the signal output end of the central processing unit through a control switch; and the central processing unit is used for receiving a signal of the temperature sensor and calculating and outputting the control signal to the heating and cooling device. In the invention, the temperature conditions of various components can be detected by using the temperature sensor and are transmitted to the central processing unit which controls the temperature in time so as to ensure that the temperatures of various components are in a proper range. The system not only can be used for monitoring the temperature of batteries, but also can be used for monitoring the temperature of a motor and a motor controller, thereby avoiding the motor and the motor controller from being damaged due to overhigh temperature. The system can also be used for monitoring the temperature in a carriage and ensures thecomfort degree of the moving space of people.

The invention relates to an ultrathin secondary battery and a preparation method thereof, and belongs to the field of electrochemistry. The thickness of the ultrathin secondary battery is 0.3-1.0mm. The ultrathin secondary battery comprises a diaphragm, a positive electrode membrane and a negative electrode membrane, wherein the positive electrode membrane and the negative electrode membrane are respectively adhered to two sides of the diaphragm and directly contact the diaphragm; the diaphragm consists of a substrate and a conductive layer; the conductive layer is positioned on one side of the substrate and directly contacts the positive electrode membrane. The preparation method comprises the following steps: firstly, respectively coating the front and back sides of the diaphragm with positive electrode slurry and negative electrode slurry according to set sizes, drying and rolling, thereby obtaining the diaphragm with the positive electrode membrane and the negative electrode membrane; secondly, pressing, thereby enabling a positive electrode current collector and a negative electrode current collector to respectively tightly contact the positive electrode membrane and the negative electrode membrane; finally, packaging by using a package membrane according to design size, performing vacuum dewatering and electrolyte injection in sequence, subsequently sealing, activating, forming, packaging for the second time, and performing volume division, thereby obtaining the ultrathin secondary battery.

The invention relates to a preparation method of a positive pole material of a thermal battery, which comprises the following steps: (1) performing forced air drying; (2) performing vacuum drying in a vacuum drying box; (3) containing in a quartz tube, and placing in a crucible resistance furnace for high-temperature treatment; (4) taking out the material which becomes a pole billet out of the quartz tube, and smashing; and (5) weighing nickel chloride treatment powder prepared in (4) according to the proportion, stirring a conductive agent after drying with a molten salt after drying, and preparing the positive pole material of the thermal battery. Commercially available nickel chloride hexahydrate is adopted as a raw material, the forced air drying and the vacuum drying are performed, and the high-temperature treatment is performed on the dried material after smashing and screening; the loose density and the tap density of the material after treatment are improved, the electrical conductivity and the thermal conductivity of the material are improved, and the electrochemical activity of the material is improved; and the weight of water contained in the material is reduced to 1000PPM from 5% before drying. The process is simplified and stabilized, the equipment investment cost is low, and conditions are created for realizing the industrialization of the positive pole material of the thermal batteries.

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 provides a method for improving the electrode stability of an aqueous electrolyte battery and an aqueous electrolyte capacitor, relates to methods for stability of batteries and capacitors, and aims at solving the problem that an existing electrode current collector is poor in stability and short in service life. According to the method, ultrathin flexible graphite paper or a conducting polymer modified graphite material is used as a positive and negative electrode current collector material of the aqueous electrolyte battery and the aqueous electrolyte capacitor; on one hand, an ultrathin flexible graphite paper coiled material is used for preparing the current collector, so that the continuous production of electrode plates can be realized; on the other hand, a conducting polymer on the surface of the ultrathin flexible graphite paper is modified, so that the problem that the electrode material is in uniform coating caused by the fact that the hydrophilia of the graphite paper is poor is solved. The method can be used in the fields of the aqueous electrolyte batteries and the aqueous electrolyte capacitors.

The invention discloses a preparation method of a carbon coated titanium-based lead dioxide positive plate which is obtained by coating a carbon material on the surface of a metallic titanium mesh with a vapor deposition method. The thickness of a carbon layer of a carbon coated titanium-based grid is 5-20 mu m. Compared with a traditional lead-acid battery positive plate, the carbon coated titanium-based lead dioxide positive plate has the characteristics of light grid mass and high mass specific energy; and further, with adoption of the carbon coated titanium-based lead dioxide positive plate, the metallic titanium-based surface layer is prevented from forming a passivation layer, contact resistance of active substances and the titanium-based grid is reduced, and the metallic titanium-based grid can be practically applied to a positive pole of the lead-acid battery.

The invention discloses a manufacturing method of a lead-carbon positive grid for a lead-acid storage battery. The manufacturing method comprises the following steps: putting a proper amount of saw dust into a muffle furnace to carbonize, taking the carbonized saw dust out, and grinding the saw dust to obtain active carbon; adding the obtained active carbon and a proper quantity of PVDF (Polyvinylidene Fluoride) bonding agent into a ball milling tank to prepare carbon slurry; adding copper blocks, calcium and aluminum blocks into a conventional vacuum induction furnace, and stirring the copper blocks, calcium and aluminum blocks uniformly to obtain copper-calcium-aluminum alloy liquid; stirring the copper-calcium-aluminum alloy liquid in a high-temperature smelting furnace, adding lead, tin and selenium in sequence, and stirring the materials till the materials are mixed uniformly to obtain a lead alloy; and pouring a half of the mixed lead alloy into a mold groove, injecting the obtained carbon slurry at a uniform speed along the middle line of the mold groove, injecting the remaining lead alloy along both sides of the mold groove at the same time, and performing cooling to obtain the lead-carbon positive grid. The obtained grid has the advantages of light mass, high weight specific energy, low production cost, high corrosion resistance and high oxygen evolution over-potential, so that the cycle life of the lead-acid storage battery is long.

The invention discloses a method for improving a uniform heat dispersion performance of a lithium ion battery electrode piece, relates to methods for uniform heat dispersion performances of battery electrode pieces and solves the problem that a heat-conducting performance of the plane of a conventional metal current collector adopted in a lithium ion battery is poor, so that the local overheating of an electrode in the charging and discharging processes occurs, and further battery bloating is caused and the service life of the battery is shortened in the prior art. The method has the characteristics that flexible graphite paper is used for replacing an aluminum foil and a copper foil in the lithium ion battery to be used as an electrode material active substance-loaded current collector; and heat at heat points of the electrode piece can be fast and uniformly dispersed by using the high heat-conducting performance of the flexible graphite paper, so that the heat points can be removed, the temperature of a battery cell is uniformly distributed, and further electrolyte decomposing, battery service life shortening and battery damage caused by the local overheating of the battery core can be avoided. The electrochemistry unreactiveness of the flexible graphite paper and the condition that the flexible graphite paper can not react with lithium ions and the electrolyte during over-charging and over-discharging are used, so that the service life of the battery is prolonged, and the safety of the battery is improved; and the method is used in the field of the batteries.

Provided are a carbon film lithium ion battery anode and a production method. A carbon film can serve as an anode current collector and can also serve as an anode active substance. The carbon film can be an intermediate phase carbon film, namely the carbon film formed by carbonizing an organic polymer material at the temperature of 800 to 2000 DEG C, and the carbon content is 90% or above. The carbon film can also be a graphite film, the graphite film formed by graphitizing the intermediate phase carbon film at the high temperature of 2000 DEG C, and the content is 99% or above. The carbon film can also be a composite carbon film, a middle layer is graphite, and an outer layer is intermediate phase carbon.

The invention discloses a palygorskite/aluminum oxide composite lithium ion battery coating diaphragm and a preparation method thereof. The surface of a lithium ion battery diaphragm substrate of the palygorskite/barium sulfate composite lithium ion battery coating diaphragm disclosed by the invention is uniformly coated by a layer of palygorskite/barium sulfate slurry; the palygorskite/barium sulfate slurry is prepared from the following raw materials by weight percent: 0.7-1.5% of a surfactant, 0.5-1.0% of a thickening agent, 6.0-12.0% of an adhesive, 0.1-0.5% of a dispersing agent, 20.0-50.0% of a palygorskite/barium sulfate mixture, 3.0-7.0% of a defomaing agent and 40.0-70.0% of a solution, wherein the sum of the percentages of the raw materials is 100.0%. The invention further discloses a preparation method. By adopting the palygorskite/barium sulfate composite lithium ion battery coating diaphragm disclosed by the invention, the electrochemical property of a lithium ion battery can be effectively improved by the related product, the cost is low, and great competitive advantages in market can be achieved.

The invention discloses a temperature control device for a power lithium battery. The temperature control device comprises a temperature controlled battery box communicated with a high-temperature liquid source and a low-temperature liquid source to form a circulation loop via pipelines, wherein a circulating pump is arranged on the circulation loop; a temperature sensor and a control unit are connected between the circulating pump and the temperature controlled battery box; and the high-temperature liquid source, as well as the low-temperature liquid source, comprises a temperature controlled liquid box with both a liquid inlet and a liquid outlet, a radiator is arranged above the temperature controlled liquid box, a metal plate is arranged between the temperature controlled liquid box and the radiator, and semiconductor temperature difference modules are respectively arranged between the metal plate and the temperature controlled liquid box, as well as between the metal plate and the radiator, and are electrically connected with a DC power supply after being coupled with each other. Through real-time detection of the temperature sensor and in-time regulation and control of the control unit, an appropriate work environment temperature can be provided for the lithium battery, the electrochemical reaction speed is increased, and the output current, the output voltage and the discharge capacity of the lithium battery are ensured to enable the lithium battery to play the optimal performance and satisfy the utilization request of the power supply.

The invention provides a negative plate and a lithium ion battery comprising the same. The invention discloses a lithium ion battery negative plate. A porous copper foil filled with a binder is adopted as a negative current collector, the liquid retention amount of the negative plate is improved due to the existence of pores in the porous copper foil, the porous copper foil is lighter than commonlight foil, the overall mass specific energy of a battery cell can be improved, and the flexibility of the negative plate is also improved; the binder filled in the pores greatly improves the bindingpower between the active material layer and the negative electrode current collector, avoids stripping of the active material layer from the negative electrode current collector due to large volume expansion of the silicon-based material, and reduces the contact resistance between the silicon-based material and the negative electrode current collector; and the silicon-based material is used, so the overall capacity of the cell can be greatly improved.

The invention relates to a back-oxygen lithium-air battery technology. According to the technology, the battery chemical reaction for combining lithium ions with oxygen ions is retained, but the position of the reaction is moved outside a catalyst layer, and an electrolyte is not used, so that reactants can be discharged conveniently. By the back-oxygen lithium-air battery technology, a lithium-air battery can work stably.