How does the lead-acid battery achieve fast charging?

In order to maximize the chemical reaction speed of the battery, shorten the battery to achieve a full charge time while ensuring that the polarization of the battery is positive and the polarity plate is reduced or light, improves the efficiency of the battery, and the rapid charging technology has been quickly developing. Currently, several rapidly charged methods are designed around the best charging curve, with the aim of making the charging curve approximates the best charging curve as much as possible. Conventional charging method uses small current chronicles, and the new battery is charged for 70 hours, and ordinary charging is also required for more than 10h. The charging time is too long, not only, it will not only draw the time of charging detection, resulting in the waste of electricity, but also limits the number of cyclic utilization of the battery, increasing the maintenance workload. The fast charging method can shorten the charging time of the battery, improve charging rate, save energy, and improve the number of battery cycle utilization, which has a significant practical significance. (1) Rapid charging technology of battery In the mid-1960s, American scientist Mas made a large number of research work for the electrical storage process, and proposed a battery-accepted charging current curve with the lowest pressure rate predicted. On the charging current, the charging time is greatly extended, and the charging current is greater than the battery-acceptable current, and there is a large amount of bubbles in the battery. However, if the actual charging current can always be equal to or close to the battery-acceptable charging current, the charging speed can be greatly accelerated, and the gas rate can also be controlled within a very low range. This is the basic theoretical basis for fast charging. However, during charging, the polarized voltage generated in the battery will hinder its own charging, and increase the impaired gas rate and temperature rise, and the polarization voltage is an important factor affecting the speed of charging. It can be seen that if you want to achieve fast charging, you must try to eliminate the effect of polarization voltage on battery charging. From the formation mechanism of the polarization voltage, it can be inferred that the size of the polarization voltage is changed with the change of the charging current. When the charging is stopped, the resistance polarization disappears, and the concentration is polarized a discharge channel and the electrochemical plan gradually weaken. If a discharge passage is provided for the battery, its reverse discharge is discharged, and the concentration and electrochemistry will disappear quickly, and the temperature in the battery is reduced by discharge. Therefore, the charging is paused during the battery charging process, and the discharge pulse is added, and various polarization voltages can be quickly efficiently eliminated, thereby increasing the charging speed. At present, everyone's comparative rapid charging method is pulsed charging, pulsed discharge depletion method. (2) Realizing the rapid charging technology 1. Improve the battery design and reduce ohm internal resistance. If the battery is used to use a copper wire, the plate gate resistance is significantly reduced. This is not only conducive to improving the utilization rate of active substances and the specific power of the battery, but also improves the fast charging performance of the battery. 2. Improve the time of reactive ion diffusion current, that is, the extension of the battery voltage reaches the gas voltage time, thereby allowing to increase the charging current, reduce the thickness of the plate, increase the active material porosity, and increase the contact area of ​​the plate gate active material. These measures are conducive to the diffusion of reactants and buildings, reduce concentration polarization, and improve allowable charging current to achieve rapid charging. However, from the life of the battery, the plates cannot be done too thin. 3. Reform the charging method of the battery. The theory of the pulse rapid charging method is basically superimposed by the charging current, and the lead ions of the reactive is superimposed in the charging current, allowing the lead ions to participate in the reaction to form and increase its concentration, and generate hydrogen ions and sulfate The ions are removed from the vicinity of the electrodes, and the integrated effect is an effective measure to reduce the concentration differential, and the battery voltage rises slowly, so that the battery is charged into more power. The currently developed intelligent charging power is designed after these conditions. 4, the effect of rapid charging on battery life. The effect of high current rapid charging on the life of the battery is still exploring. The industry also has different views. First, the service life of the battery is not consistent, and its cycle life can even be 1 times. Furthermore, in the long-term life test, it is difficult to ensure that the batteries test conditions are completely consistent. While generally considered that high current rapid charging does not adversely affect the life of the valve sealing lead-acid battery. Recommend: LiFePO4 Battery Manufacturer Energy storage battery Manufacturer Integrated machine energy storage battery series Manufacturer Lead lithium battery Manufacturer Outdoor Backup Battery Manufacturer Portable outdoor power supply Manufacturer Power battery Manufacturer Powerwall LiFePO4 Battery Manufacturer Battery rack Manufacturers Telecom LiFePO4 Battery Manufacturer Wall mounted battery storage Manufacturer China Lifepo4 Battery