About the lithium battery common noun explanation

Source: 2020 - 04 - Lithium-ion batteries - 14 18:49 hits: time Capacity, voltage, resistance, multiplier/hour rate, self-discharge, memory effect, cycle life ability & bull; Lithium battery capacity by certain discharge conditions are given, known as the capacity of lithium-ion batteries, with the symbol C ( Capacity) Said. Common unit is ampere hour ( Ah) Or mah. Voltage & bull; The open circuit voltage ( OCV) Lithium battery terminal voltage under open circuit state referred to as the open circuit voltage. Lithium battery open circuit voltage is equal to the positive electrode potential and the difference of the negative potential. • Working voltage is refers to the lithium battery voltage on load after shows in the process of discharge voltage, also known as the discharge voltage. The working voltage of lithium battery when the initial discharge referred to as the initial voltage. As a result of the existence of ohm resistance and polarization potential, the working voltage of the lithium battery is lower than after load on the open circuit voltage. Internal resistance & bull; An electric current passes through the lithium battery resistance reduces the voltage of lithium battery. This resistance is called lithium battery internal resistance. • Lithium battery internal resistance is not constant, in the process of discharge change over time, because of the active material composition, concentration of electrolyte and temperature is changing. • Lithium battery internal resistance including the ohmic resistance and the polarization resistance, polarization resistance including electrochemical polarization and concentration polarization. The existence of the internal resistance makes lithium battery discharge when the terminal voltage is lower than the electromotive force of lithium-ion batteries and open circuit voltage, charging voltage higher than the electromotive force and open circuit voltage. • Ohm resistor follow ohm's law; Polarization resistance increases with the increase of current density and, but it is not linear, always increases with the increase of current density logarithm linear. Charge and discharge rate multiplier: refers to the lithium battery within the prescribed period of time to release the current value of the rated capacity needed. If the rated capacity of 600 mah lithium battery, 600 ma is 1 c ( 1 multiplier) , 300 ma is 0. 5c, 6A ( 6000mA) For 10 c, and so on. Rate, also known as hourly rate, refers to the battery discharge lithium battery at a certain number of hours needed to its rated capacity. If the rated capacity of 600 mah lithium-ion batteries, the discharge current of 600 ma, need 1 hour, so the current of 600 ma is 1 hour and the rate of self-discharge self-discharge is refers to the lithium battery in connection with the outside world, under the condition of spontaneous reaction caused by the chemical energy loss. Lithium battery self-discharge rate for lithium-ion batteries to store after a period of time, the initial capacity of lithium-ion batteries minus the lithium battery storage capacity of the ratio of initial capacity. Lithium ion, lithium battery self-discharge rate of no more than 10% a month, far less than 30% of the lithium nickel metal hydride batteries and nickel-cadmium lithium batteries at 15%. Memory effect of lithium battery memory effect refers to the lithium battery when charging does not discharge, not discharge the battery plate 'crystallization, referred to as the 'memory effect'. When the memory effect, lithium battery capacity will be a significant reduction. Lithium ion batteries before discharge, nickel cadmium, lithium battery with no memory problems. Cycle life & bull; Cycle life of lithium battery is lithium battery after a full charge completely discharge the cycle of life and the cycle continues to 75% capacity attenuation to the original capacity. • Cycle life associated with lithium battery charge and discharge conditions. • 1 c of charge and discharge cycle life can reach 1000 - at room temperature 1500 times.