Introduces some basic concepts about the battery

Source: 2020 - 04 - 14 17:927 hits: time to some basic concepts about the battery in the battery industry today, there are some basic terms for better understanding and research of lithium ion batteries are very helpful. 1. There can be disposable battery: the battery discharge behavior, can't reuse, repeated charge and discharge. 2. Secondary battery: compared with a battery, the battery can be repeated charge and discharge, is a kind of rechargeable battery. 3. Open circuit voltage, the battery in the case of no load, the positive and negative voltage. 4. The closed circuit voltage: closed circuit voltage is often referred to as the working voltage, is refers to the battery voltage under load. 5. Discharge rate: is the index of battery discharge rate. Battery capacity in unit time ( 1 hour) 1 c discharge, discharge rate. Discharge in 2 hours, discharge rate is 0. 5度; If the discharge time is 0. 5 hours, the discharge rate of 2 c. 6. Self-discharge: battery itself in the absence of external load generated by the energy loss. 7. Charging excessive: in the process of charging, when the battery reaches the maximum voltage, continue to charge, charge excessive can cause great damage to the battery, is also very dangerous. 8. Discharge characteristic: reflected in the discharge rate in the process of battery discharge, discharge curve, discharge capacity and so on characteristics. 9. Discharge curve, the curve of the battery discharge voltage change over time. The safety of the lithium ion battery is that its thermal stability in today's society, the level of human science and technology are in rapid development phase, but in the process of development will be restricted by the energy crisis, which requires the presence of the new energy. At present, lithium ion battery is widely used as a kind of important energy. It in the field of electronic communications and transportation play an extremely important role and has a broad application prospect. Lithium ion battery has given a big, long service life, green pollution-free advantages. But in use process, lithium ion battery, there is some hot security problems, it also affects the lithium ion battery is widely used in more fields. Research found that lithium ion battery thermal runaway and even burn with large current charging is the major cause of the explosion, or hit in the process of using or extrusion. Therefore, study the thermal safety of lithium ion battery, battery in the process of charging and discharging temperature distribution and change, to predict and evaluate reliability of lithium ion battery, controlling its thermal safety is of great importance. In the process of learning, we should understand the development trend of lithium ion battery and some problems in the application, especially the lithium ion battery in the process of using the heat generated by the analysis of problems and potential safety hazard. Second, the classification, the characteristics of lithium ion battery, working principle and composition of the material were studied and the research, analyses the heating mechanism of lithium ion battery of lithium ion battery temperature field analysis provides a theoretical basis. , combined with the classical heat transfer theory, combined with the knowledge of the finite element, selecting the appropriate thermal analysis method, according to the practical application of the working process of the entity in the process of lithium ion battery and hot issues, abstract, regularity, formula, preliminary chose one general, is, of course, the appropriate assumptions and simplify the Li - heat treated Ion battery mathematical model.