123 results about "Reaction model" patented technology

The invention discloses a pyroelectric detection method for the over-charged safety performance of a lithium ion battery. The method comprises the steps of building a charge conversation model, a mass conservation model and an electrochemical reaction model of the lithium ion battery; simulating the electrical property and electrochemical performance of the electrochemical performance; acquiring a temperature variation simulation curve by simulating the heat production process of the lithium ion battery; charging and over-charging the lithium ion battery, and measuring a practical temperature change curve and a voltage change curve of the lithium ion battery; setting temperature and voltage threshold values, comparing the temperature change curve with the temperature threshold and a temperature change simulation curve, comparing the voltage change curve with the voltage threshold, and detecting the over-charge safety performance of the lithium ion battery. According to the pyroelectric detection method, by contacting the heating effect with electrochemical performance of the lithium ion battery, the rapid pyroelectric detection method for the over-charged safety performance of the lithium ion battery can be provided. The invention further discloses a pyroelectric detection device for the over-charged safety performance of the lithium ion battery.

A battery model unit includes an electrode reaction model unit based on the Butler_Volmer equation, an electrolyte lithium concentration distribution model unit analyzing a lithium ion concentration distribution in an electrolyte solution by a diffusion equation, an active material lithium concentration distribution model unit analyzing an ion concentration distribution in a solid state of an active material by a diffusion equation, a current / potential distribution model unit for obtaining a potential distribution according to the charge conservation law, a thermal diffusion model unit and a boundary condition setting unit. The boundary condition setting unit (66) sets a boundary condition at an electrode interface such that a reacting weight at the electrode interface is not determined by a difference in material concentration between positions but a deviation from an electrochemically balanced state causes a change with time in lithium concentration at the interface and thus a (time-based) drive power for material transportation. Thereby, an appropriate charge / discharge control can be performed based on the battery model having the appropriately set battery condition.

An engine exhaust purification device comprises: a selective reduction type NOx catalyst; an oxidation catalyst disposed on an upstream side of the NOx catalyst; a reducing agent adding device which adds an NOx reducing agent to an exhaust gas of an engine; a control device which controls the reducing agent adding device; and an NO2 ratio calculation device which estimates an NO2 ratio of the exhaust gas flowing into the NOx catalyst. The NO2 ratio of the exhaust gas flowing into the NOx catalyst is calculated by a catalytic reaction model where the oxidation reaction of NO in the oxidation catalyst is numerically formulated, and the NO2 ratio is reflected to calculate an amount of ammonia adsorbed on the NOx catalyst by a catalytic reaction model where a chemical reaction concerned with the reduction of NOx in the NOx catalyst is numerically formulated.

The invention provides a reaction and seepage characteristic integrated test method and device in an oil reservoir. Simulation reaction in the oil reservoir is performed through an integrated test unit, permeability testing is performed on reacted rock cores, permeability parameters during permeability testing is measured, the permeability of the rock cores after the simulation reaction is calculated according to the parameters, physical parameters of a reaction model and physical property parameters of injection high-pressure fluid, and accordingly, simulation reaction and permeability testing in the oil reservoir are achieved simultaneously through one device, and permeability testing is performed on the reacted rock cores creatively. The method and the device can be used for determining influence rules of simulation reactions to seepage characteristics.

The invention discloses a method for simulating a fluidized bed with dynamic changes of grain density and particle size. The method comprises the following steps: 1, establishing a basic flow reaction model in the fluidized bed; 2, establishing a mathematical model for describing a change rule of the grain phase density and particle size; 3, establishing a particle type sectioned drag model; and 4, predicting flow reaction characteristics in the fluidized bed. According to the method disclosed by the invention, the fluidized bed with dynamic changes of grain density and particle size is subjected to simulation study by adopting a computational fluid mechanics method, the mathematical model for describing a change rule of the grain phase density and particle size is combined to perform real-time correction on the density and particle size of the particles, and the acting force between gas-particle phases in a coexisting system of multiple particle types through the particle type sectioned drag model, so that the flow reaction characteristics in the fluidized bed with the dynamic changes of grain density and particle size are accurately predicted. According to the method, lots of complicated and expensive experiment researches are not needed, and lots of manpower and material resources and time cost can be saved.

The invention discloses a method for predicting the thickness of a uniform piezoelectric electrode scale layer of a converter valve based on an electrode reaction. In order to solve the electrochemical corrosion and overheating problems caused by the fouling of homogeneous piezoelectric electrodes in the current water cooling system of converter valves, the technical scheme adopted by the invention is as follows: according to the internal cooling system structure of the valve section of the converter valve which is cooled by the parallel water circuit adopted by the converter station, the physical model structure of the water channel electrode reaction of the valve section is determined, and according to the operation condition, the calculation model of the water channel electrode reactionof the valve section is further established; the initial values and boundary conditions of electrode potential and deionized water potential are set by using the geometrical parameters of water channel, water quality parameters of deionized water and the working voltage value of converter valve when it is running. The electrode reaction model is constructed. The electrode fouling thickness is calculated. The present invention is advantageous to further acquiring the fouling data of the homogeneous piezoelectric electrode in the operation process of the converter valve, grasping the electrodefouling rule, timely replacing the homogeneous piezoelectric electrode of the converter valve, and providing powerful theoretical and technical support for guaranteeing the safe and stable operation of the converter station.

A method for conducting an accelerated life test of a polymer coated metallic sample includes placing the sample below the water surface in a test tank containing water and an oxygen containing gas. Cathodic polarization of the metallic portion of the sample is increased. This can be by using a voltage source or a sacrificial anode. Dissolved oxygen in the test tank water is also increased. Dissolved oxygen can be increased by providing oxygen under pressure to the tank or through an aerator under the water surface. Temperature can also be regulated to accelerate the test speed. Delamination of the sample is periodically tested through a peel test or by other means. The invention also provides a reaction model independent method for calculating activation energy.