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Lithium battery, portable power station - You need to know about ten main parameters of lithium ion batteries

by:Vglory      2020-08-15
Lithium ion battery is lithium battery core, portable power station main parameters usually refers to electronic, mechanical properties and storage performance parameters. Electrical dunk electromotive force, open circuit voltage and working voltage, resistance, charging voltage, capacitance, the specific energy ( Than the male rate) And life and so on, to buy lithium battery, portable power station is you need to understand the lithium ion battery of ten main parameters. 1, the electromotive force of battery electromotive force, also known as the battery voltage standard voltage or theory, for the battery open circuit ( No current flows through the line) The potential difference between the positive and negative poles. 2, voltage lithium ion battery voltage: parameters including the open circuit voltage, voltage and working voltage and charging voltage, etc. Open circuit voltage: is open circuit when there is no current flows through the potential difference between a battery is negative. Open circuit voltage is less than the battery electromotive force. Termination voltage, charging the battery in the hotel or the lowest points specified in the highest point voltage or charging voltage, for lithium-ion batteries, the secondary battery, the termination voltage of considering the battery capacity is determined on the basis of considering the cycle stability. When low or high current discharge, due to the polarization is serious, in order to ensure the full use of the active material, generally the charging discharging termination voltage will be wider. Working voltage: also called discharge voltage or load voltage, it is to point to an electric current passes through the external circuit, battery electrodes, the potential difference between for battery in the process of operation of the actual output voltage, over current and discharge level in its size between the open circuit voltage and the termination voltage range change. Charging voltage: only for secondary battery, charging for the secondary voltage of the battery. In the constant current charging, charging voltage increased gradually along with the charging time of singing. In constant voltage charging, the charging current with singing quickly reduce the charging time. 3, battery internal resistance is an important measure of battery performance, battery internal resistance is big, can reduce the working voltage of battery discharge, increase the battery internal energy losses, exacerbating the fever of the battery. Mainly by the battery internal resistance size battery materials, manufacturing process, structure and other factors. 4, the electric capacity of battery capacity unit for AH, contains theoretical capacity ( Refers to according to participate in the electrochemical reaction of the active material electrochemical equivalent to calculate power) , the rated capacity ( Refers to in the design and production of batteries, battery discharge conditions is stipulated or guarantee the should put out the minimum power) , the actual capacity ( Refers to under certain discharge conditions, namely under certain discharge current and the temperature, battery power termination voltage produced by 。 5, energy and specific energy refers to the cells in a certain discharge conditions can make electric work, he is equal to the battery discharge capacity and the average working voltage, the product of unit Wh said. 6, refers to the power and power than a certain discharge conditions, the energy output by the battery in unit time and unit for tile ( W) Or ( 千瓦) 。 The battery unit mass or volume of power is called than the power of the battery. 7, when it comes to battery capacity or energy discharge current, it must be noted that the discharge current size or discharge conditions, usually expressed in discharge rate. Discharge rate refers to the speed of discharge, the commonly used 'rate' and 'ratio' said. 8, the coulomb efficiency is also called the charge-discharge efficiency, discharge power and the percentage of the rechargeable battery, said is characterization of secondary battery electric reversibility and determine the important parameters of battery life. 9, storage performance and self-discharge battery when open, under certain conditions, Such as temperature, humidity, etc. ) The size of the storage self-discharge after a certain period of time. The battery during storage, although there is no point of energy released, but there is always self-discharge phenomenon inside the battery. 10, lithium batteries battery life of portable power station for a battery, the service life of the battery life is mainly refers to shelve, namely under the condition of no load cell placed after the performance indicators stipulated in the required time. More about lithium battery, portable power station problems related to reference the method of prolonging the service life of the lithium battery, portable power station'
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