Talking about the factors that affect the life of electric forklift batteries?

As the core component of the DC power supply system, the battery plays a key role in storing electric energy, coping with abnormal grid and special working conditions, and maintaining the normal operation of the system. It is the last line of defense for the normal operation of the power system. At present, online battery monitoring is gradually being valued by people, and it is more and more widely used in power, communication and other industries. However, the key technology used in battery online monitoring and condition assessment---internal resistance AC discharge method is not understood by people. , Still in vague understanding, due to the misleading of the word 'maintenance-freeAccidents with power plants are not uncommon. Therefore, the correct use and maintenance of the battery to improve its service life is of great significance. 　　 The main factors affecting the internal resistance of the battery are: The main factors that affect the internal resistance of the battery are: 　　 Battery usage time: As the use time increases, The loss of electrolyte, the corrosion of the electrode plates and the connecting strips, the sulfation of the electrode plates, the deformation of the electrode plates and the shedding of active materials, etc., cause the capacity of the battery to decrease and the internal resistance of the battery to increase.　　 The amount of charge of the battery: Due to the difference in the depth of electrolyte injected into the battery, the thickness of the reaction material on the electrode surface, the porosity of the electrode surface, etc., the internal resistance of the battery is different, and the amount of charge is also different.　　Temperature: A change in ambient temperature, such as an increase, will accelerate the diffusion of reactive substances, charge transfer, electrode kinetics, and substance transfer are easier, so the internal resistance of the battery is reduced. Otherwise, it will increase.　　 Battery model: Different manufacturers, different types, and different models of batteries have different internal resistances due to different material formulations of electrodes, electrolytes, and diaphragms, different battery structures, and different assembly processes.　　 Measuring signal frequency: At present, many battery internal resistance measurements actually measure the impedance of the battery, which includes capacitive reactance, and the magnitude of the capacitive reactance is related to the frequency of the measurement signal, so that the measurement result of the battery internal resistance is not objective. To be objective, the influence of battery capacitance on the measurement result should be removed analytically according to the phase relationship between the measured signal current and voltage, so that the measurement rate result has nothing to do with the signal measurement frequency, that is, the internal resistance is measured at any measurement signal frequency. The result is unique. Measurement time and measurement current size: In the case of using a larger measurement current, at the moment when the measurement signal is applied and the measurement signal is turned off, since the establishment and stability of polarization is a changing process, different measurement currents, different measurement times, extreme The change is different, so that the measurement result of the internal resistance of the battery is not objective. To be objective, the internal resistance should be measured with a smaller signal current as much as possible. According to the experiment, the measured current is less than or equal to 0.05C10, (where C10 is the capacity of the battery at a discharge rate of 10 hours.) 　　 The effect of overcharge long-term overcharge In the state, the positive electrode is consumed due to oxygen evolution reaction, water is consumed, and h+ increases, which leads to an increase in acidity near the positive electrode, accelerated grid corrosion, thinning of the grid, accelerated battery corrosion, and reduced battery capacity. At the same time, due to increased water loss, There is a danger of the battery drying up, which will affect the battery life.　　The effect of over-discharge　　Battery over-discharge mainly occurs when the AC power supply fails, and the battery supplies power to the load for a long time. When the battery is over-discharged to the point where its voltage is too low or even zero, a large amount of lead sulfate inside the battery will be adsorbed on the surface of the battery's cathode, causing 'sulfation' on the battery's cathode. Lead sulfate is an insulator, and its formation will have a great negative impact on the charge and discharge performance of the battery. Therefore, the more sulfate formed on the cathode, the greater the internal resistance of the battery and the charge and discharge performance of the battery. The worse, the shorter the service life of the battery.