The factors that affect the capacity of the battery repair instrument include the structure of the plate, the size of the charge and discharge current, the temperature and density of the electrolyte, etc. Among them, charging and discharging current and temperature have the greatest impact. If the charging and discharging current is too large, the active material of the plate will change on the surface and the capacity will be greatly reduced. The discharge current of the batteries is different. The capacity that can be discharged is also different: the higher the discharge current, the lower the amount of electricity that can be discharged. For example, the commonly used current for electric bicycles is 5 A. Using a nominal 10 Ah battery corresponds to a battery life of 2 hours. discharge rate. If 10 hours discharge rate is used, can reach 12 AH. Therefore, to evaluate the capacity of a batteryie, one must not only look at the nominal capacity of the battery, but also the discharge rate of the battery. Electric bike batteries are often rated at 10AH, and the same battery can also be rated at 12AH and 14AH. For example, a 14 Ah battery may also be marked as 17 Ah. There are also batteries marked 20AH. The nominal value of the battery capacity is larger, but the capacity has not changed significantly. Changes in Internal Resistance During Battery Repair Internal resistance of the battery refers to the resistance encountered when current passes through the interior of the battery. The internal resistance of lead-acid batteries is very low and special instruments are required to measure it in order to obtain it. more precise results. Battery repair instruments in general The internal resistance of the battery refers to the internal resistanceerne of the charged state, that is, the internal resistance of the TV when the battery is fully charged. This is internal discharged resistance, which refers to the internal resistance of the battery once it is completely discharged. Generally speaking, the internal resistance in the discharge state is greater than the internal resistance in the charge state and is less stable. The greater the internal resistance of the battery, the more power the battery consumes, making it less efficient. A battery with large internal resistance will heat up a lot when charging, causing the battery temperature to rise sharply, which will have a great impact on the battery and charger. As the number of times the battery is used increases, the internal resistance of the battery will increase to varying degrees due to the consumption of electrolyte and the reduction of the activity of chemical substances inthe internal resistance of the battery. Lower quality batteries. increase faster. The internal resistance of the battery will increase due to increased discharge, especially when the discharge is complete. The impedance is greatest, mainly because the discharge causes the plate to produce lead sulfate, a poor conductor, and density. electrolyte decreases. Therefore, it should be charged immediately after discharge, if allowed to continue to discharge, after the lead sulfate forms stable white crystals, even if charged, the active material of the plate will not cannot be restored. its original condition, which will reduce battery life.
Which is better, a lithium iron phosphate battery or a ternary lithium battery? What is the difference?
If you compare batteries with the same voltage and capacity, it is possible that thelead acid battery has a slightly longer autonomy. But the lifespan of lithium batteries will be longer. Lead-acid batteries are generally used for more than two years and the battery capacity will decrease significantly. The capacity of lithium batteries decreases much more slowly and can be used for a longer period of time.
1. Disadvantages of lead-acid batteries:
Heavy weight, limited battery capacity and short lifespan. Lead-acid batteries typically last two years after 400 deep charges. deep discharges approx.
2.Disadvantages of batteries:
Lithium batteries have high production costs, expensive production equipment and labor costs accounting for about 40% of production costs. The price is about three times that of lead-acid batteries. At the same time, lithium batteries are not recyclable et can only be thrown away when they are worn out. Another important problem is that lithium batteries pose potential fire and explosion hazards, especially when consumers are unknowingly deceived by profiteers into purchasing low-quality lithium batteries. In electric vehicles, the sealing conditions are not very good and can easily cause damage. Humidity. Poor contact and other reasons may cause safety hazards.
Ternary lithium batteries are significantly better. The difference is that first of all, the price of lithium batteries is lower than that of iron phosphate. Second, lithium batteries are environmentally friendly batteries. and can be used for more recycling time. Lithium batteries are safer and have a longer lifespan. ?
Iron lithium phosphatem has two disadvantages that cannot be ignored: the first is that the energy density is relatively low, the weight is large, and the volume is large; the second is that it is relatively sensitive to; Temperature. In low temperature environments, the carrying capacity will decrease significantly. Since the energy density does not meet the national requirement of 150 Wh/kg, it is not suitable for large-scale application in passenger cars. ?
Ternary lithium batteries, due to the significant increase in energy density, smaller battery size and lighter weight, free up more practical space in the passenger compartment or chest. Therefore, overall, ternary lithium batteries have more obvious advantages in the current policy environment. ?
Ternary lithium batteries have high energy density and better performancecycle ances than normal iron phosphate. At present, with the continuous improvement of the formula and the improvement of the structure, the rated voltage of the battery has reached 3.7V and the capacity has reached or exceeded the level of iron phosphate batteries. Ternary lithium polymer batteries have better characteristics than lithium iron phosphate batteries, so ternary lithium polymer batteries are better.