Factors affecting lead-acid battery life:
1. Deep discharge. The lead battery used in the car is only a one-way discharge when the ignition, the generator will automatically charge the battery, do not cause battery depth discharge. and electric bicycles can not be charged when riding, often more than 60% of the depth of discharge, deep discharge, the concentration of lead sulfate increased, vulcanization will be quite serious.
2. Large current discharge. The 20-kilometer cruise current in an electric car is typically 4 A, which is already higher than the battery operating current in other fields, and the overloaded electric car has a larger operating current. Battery manufacturers have conducted a cycle life test of 1C charge 70%,2c discharge 60%. After such a life test, can reach the charge and discharge cycle of 350 times life of the battery, but the actual use of the effect is far away. This is because large current work increases the discharge depth by 50%, and the battery accelerates vulcanization. So, the battery life of electric tricycle is shorter, because the car body of the tricycle is too heavy, the working current reaches above 6A.
3. High charge and discharge frequency. The battery in the Back-up power supply field, only when the power failure will discharge, if 8 times a year stop electricity, to reach 10 years of life, only to do 80 times cycle charge life, and electric car charge and discharge cycle of more than 300 times is very common.
4. Short time charge. Because the electric bicycle is a means of transport, can not charge a lot of time, in 8 hours to complete 36 volts or 48 volts of 20 when charging, this must increase the charging voltage (generally a single section 2.7~2.9 volts), When the charge voltage exceeds the oxygen supply of a single battery (2.35 volts) or hydrogen (2.42 volts), the battery will open valve exhaust because of excessive oxygen analysis, resulting in water loss, increasing the concentration of electrolyte, and aggravating the vulcanization of the battery.
5. Can not charge after discharging. As a means of transport, electric bicycles charge and discharge is completely separated, after the discharge is difficult to timely charging, and after the discharge of a large number of lead sulfate if not charged for more than half an hour to restore lead oxide, will be cured into crystals.