The advantage of the lithium ion battery and planning challenges

Source: 2020 - 03 - 31 do hits: once a lumped model to estimate the parameters of the lithium ion battery were lithium can be used for a variety of purposes, but its application in the battery is perhaps the most compelling. Lithium-ion batteries can be used for electric vehicles, energy storage system, etc. When lithium-ion batteries used in these areas, it is important to the engineer to electrochemical analysis in the first place, to ensure its performance in line with expectations. When the battery is made by a third party, there may be a problem: the manufacturer will not reveal important information about the lithium ion battery to the engineer, Such as internal structure) 。 Let's take a look at the budget of lithium ion battery concentrated model parameters. The advantage of the lithium ion battery and lithium planning challenges are the third kind of elements in the periodic table, have many special properties. But with carbonate medicines as a mood stabilizer, are effective drugs for the treatment of fickleness. When heated, it can produce red, which will help to color the fireworks. Metal lithium is the lightest element on the periodic table, when the lightning (to the plan Such as space travel and plane) Very important, this is a useful feature. Lithium is also a good battery material: in addition to the light weight, it also has the very high energy density and the electrochemical potential. Lithium-ion battery was first put forward in the 1970 s, and was developed in the 90 s, is one of the most popular rechargeable batteries, for the following purposes: mobile phones and tablets mobile devices such as solar energy storage system of electric car lithium-ion batteries can be used in mobile phones. In lithium ion batteries used in mobile phones and other devices, they need electricity and heat test. However, this may be difficult, batteries, usually from a third party company purchase these companies usually do not provide detailed information on the battery internal structure, the thickness of the electrodes, for example, a specific chemical composition and the size of the electrode material, and so on, and battery engineers need to know the information, in order to battery and its thermal system analysis and planning. Engineers may be of interest to the data including the open circuit voltage with the state of charge ( SOC) The change of the; Transmission characteristics ( For example, dispersion and conductivity) ; And because of the different types of potential ( Including activation, concentration overpotential and ohms) Caused by the potential losses. In order to plan a battery system can be used for a given device, engineers can use a lumped model, through the simulation software COMSOL more physical fields and their additional optimization module to estimate parameters, then provide reliable speculation within a given scope of work. In lumped model, when the battery systems are integrated into the equipment, there will be a few lumped parameter, guessing electrical function from these parameters can effectively obtain the required information, and the specific thermal analysis. Create a lumped lithium-ion battery model of time-varying lumped battery model parameter estimation is made up of two parts: establishing and solving the lumped model of battery electrodes for lithium ion battery parameters budget can be used in the transmission and response process - a lumped dispersion To describe the response equation. This is the so-called 'single particle model, compared with the traditional analysis model, greatly reduces the resource accounting. Other losses, such as the activation and ohmic losses are taken into account. Lumped battery interface, can be calculated according to the battery voltage measurement of charge and discharge cycle changes. Lumped model describing the mass transfer and charge transfer and how the ohmic losses by just a few lumped parameters affect the potential loss of the battery.