The design life of lead-acid battery manufacturers can reach 10 years, but the actual service life is only 1-2 years. Why is there such a big difference? There are many reasons. The following will discuss the problems affecting the life of lead-acid batteries and their solutions. Detailed answer:
1: The problem of vulcanization, this problem directly affects the life of the battery, this problem has been plaguing the research and production of batteries all over the world, and everyone is trying to find a way to break through, but they have never been able to break through. No matter what kind of battery, in the process of operation Vulcanization will occur in the battery, that is to say, during the charging process of the battery, due to the increase of charging temperature, sulfuric acid crystals will be precipitated. Ordinary chargers do not have the function of sulfide reduction, which accelerates the irreversible problem of sulfide crystals and the end of battery life. No matter what kind of charger, sulfide phenomenon cannot be avoided, it is only a matter of speed. 80 More than 100% of batteries are due to the phenomenon of vulcanization, which leads to low service life, which seriously affects the utilization rate of resources and the cost of use.
2: The problem of thermal runaway. Due to the production process, after most batteries are produced, there will be a problem of uneven capacity. If it is used in a single cell, it will be better. If it is used in combination, there will be different sizes. When charging It will cause some batteries to be fully charged, some not yet fully charged, and when they are fully charged, the previous ones will be overcharged, and overcharging will greatly reduce the life of the battery. After a long time, the temperature of the small ones will be very high. This will cause thermal runaway, which will deform the shape of the battery and bulge. Thermal runaway will also increase the concentration of sulfuric acid, accelerate the generation of sulfide crystals, and reduce the service life.
3: The problem of the charger, now generally use a three-stage charger, that is, floating charge, constant charge, constant voltage charge, this charging method will not cause strong current and voltage to act on the battery, resulting in overcharging, if the charging The quality is not good, and overcharging will cause great damage to the battery. Generally, electric vehicle users cannot judge this problem. Overcharging is also the main reason for the short life of the battery.
4: The problem of over-discharge, over-discharge is during the operation of the battery, because the user wants to accelerate suddenly or force to pass in bad road conditions, it will easily cause over-discharge. At that time, the battery is still running, which will seriously affect the "heart" part of the battery, the "plate". Once the plate is damaged, its life will be greatly reduced, and even repairs will be powerless.
5: Frequent charging. Consumers often think that no matter how much electricity is used, as long as the battery is not in operation, it is often charged, which will protect the battery from the impact of power loss. In fact, the number of cycles of the battery is certain. Between 350 and 400, that is to say, when the charging reaches or exceeds this number, it means that the battery’s end-of-life time is up, so the charging depends on the amount of power before deciding whether to supplement the power.
6: The influence of temperature, when the external temperature is high, the activity of the battery is high, and the energy is relatively strong, and when the temperature is low, the activity of the battery will decrease, and the capacity will decrease. If the temperature is constant, the life of the battery will also increase. On the contrary, it will decrease. Winter is often the peak period of battery scrapping, so it is especially necessary to strengthen the protection of battery in winter.