Introduce two kinds of lithium ion battery protection scheme

Source: 2020 - 04 - 14 19:59 hits: two kinds of lithium ion battery protection scheme with the development of the society, the application range of the lithium ion battery is more and more widely, users of cell size and capacity is higher and higher demands are proposed. For ordinary users, the battery is basically don't know how to maintain and protect all kinds of lithium ion batteries. At present, the common type of lithium ion batteries have a cylindrical lithium ion batteries, polymer lithium battery, ferric sulfate, lithium batteries, etc. Different types of lithium battery in the process of maintenance, the need to pay attention to details is not the same. The small series of examples to illustrate how to cylindrical lithium-ion batteries and the protection of the square lithium ion battery. The first: cylindrical lithium-ion battery protection scheme battery core using the PPTC ( Recycled safety device) For temperature, over-current protection. When the battery core temperature too high or too much electricity, PPTC will enter a state of high resistance, which hinder the charge and discharge current of battery core, prevent battery burning explosion. So when using cylindrical lithium-ion batteries, must pay attention to temperature and voltage and current. Second: square lithium ion battery protection scheme protection circuit has a level of protection: also called active protection ( IC and mosfet) , the secondary protection, also known as passive protection ( 民族主义者行动党(MHP), PTC,保险丝) 。 民族主义者行动党(mhp) - Ta and the design of PPTC near the battery core, can make the MHP - Ta and PPTC better perception of the battery temperature. When the temperature of the battery is unusually high, can produce larger resistance, prevent battery charge and discharge current, ensure safe use of the battery. To sum up, the protection of the lithium ion batteries or maintenance is very simple, as long as the ordinary users pay attention to some details. Protection of lithium ion battery not only prolong the service life of the battery, also involves the security of the battery, may be an explosion, endanger the safety of the user. For example, if the phone suddenly explosion, phone lithium battery may explode because of the collision or short circuit. Carbon dioxide and carbonate oligomer. Dubeshter et al. describes a measurement method of hole curvature/porosity ( The positive rate of bending for ( 3. 74± 0. 38) , porosity, 21. 5%± 0. 25%) Bending, rate is higher than bruggeman relation between the predicted value. Ganter and others will cycle the positive remove 20% of LiFePO4 battery capacity attenuation, electrochemical lithium or lithium chemistry, can restore the positive performance. This may be a kind of low energy consumption of lithium iron phosphate battery anode recycling method. Dubarry et al. Analysis of the power and energy capacity attenuation properties of the lithium iron phosphate batteries. For high power battery, the capacity of the first 300 cycle attenuation mainly associated with the loss of active lithium. However, energy battery is a complex situation. By analyzing capacity attenuation behavior and dQ/dV charge and discharge curves at different rates, can be concluded that in 120 the first cycle, lost active lithium and the loss of negative active material discharge, the main factors and the increase of active positive electrode surface area can result in electrochemistry