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Several factors affecting battery life

Return Listsource:Gratene date: 2022-06-17

Several factors affecting battery life1) Depth discharge. The discharge depth affects the cycle life of the battery, and the battery will be shortened if the battery is discharged frequently. Because the same rated battery depth discharge means that the large current is charged and discharged, when the high current is discharged or often in an undervoltage state, it cannot be recharged in time, and the resulting sulfate particles are large, and the plate active material cannot be Take advantage of it, the actual capacity of the battery will gradually decrease, affecting the normal operation of the battery. Since the solar photovoltaic power generation system is generally less likely to produce overcharge, the long-term loss of loss is the main reason for the failure and life shortage of battery cells in solar photovoltaic systems. (2) discharge rate. Generally specified 20 hours of discharge rate is the rated capacity of the battery. If the discharge ratio below the specified hour is obtained, the battery capacity above the rated value can be obtained; if the discharge rate above the specified hour is used, the discharged capacity is smaller than the battery rated capacity, and the discharge rate also affects the end of the battery. Voltage value. When the battery is discharged, the electrochemical reaction current is preferentially distributed over the surface closest to the main body solution, resulting in a porous electrode inside the surface of the electrode surface to form sulfate. When the large current is discharged, the above problem is more prominent, so the discharge current is large, the smaller the capacity given by the battery, and the end voltage value is speed, that is, the discharge stop voltage value decreases with the increase of the discharge current. On the other hand, it is also not the discharge rate, the better, and the study shows that the long-term too small discharge rate will significantly increase the amount of sulfate molecules, resulting in stress to cause polar bending and active material falling off, and also reduce the use of the battery life. (3) Excessive temperature is too high. The rated capacity of the battery refers to the value of the battery at 25 ¡ã C, which is generally considered to work with the operating temperature of the valve-controlled sealing lead-acid battery. When the battery temperature is too low, the battery capacity is reduced because the electrolyte does not have a good reaction with the active material of the plate under low temperature conditions. Capacity reduction will not meet the expected backup time and remain within the specified discharge depth, it is easy to cause over-discharge of the battery. From the external parameters of the battery, the voltage is very large, the temperature is 1 ¡ã C per liter, the voltage drop of monozet cells is 3mV. That is, the voltage of the lead-acid battery has a negative temperature coefficient, its value is -3mv / ¡ã C. The same truth, environmental temperature rise is easy to cause battery over-discharge. High temperature will also bring battery loss, thermal out-of control phenomenon. Temperature is a major factor affecting the normal operation of the battery, in the solar photovoltaic system, generally requires temperature compensation functionality. (4) Local discharge. (5) High temperature storag 


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