5 reasons for the short life of electric vehicle batteries

Many people complain that the quality of the current battery is poor, and it will be broken after a short period of time. In fact, the quality of the battery is poor and the life is short, mainly due to the following five major reasons: 　　The first reason: the sulfide caused by the battery itself 　　 lead-acid batteries when charging, lead sulfate forms lead oxide, and lead oxide is reduced to lead sulfate during discharge. Lead sulfate is a substance that is very easy to crystallize. When the concentration of lead sulfate in the electrolytic solution of the battery is too high or the static idle time is too long, it will form small crystals. These small crystals attract the surrounding lead sulfate, just like Like snowballs, large inert crystals are formed, and the crystallized lead sulfate adheres to the electrode plate, causing the working area of u200bu200bthe electrode plate to decrease. This phenomenon is called vulcanization. The main mechanism leading to lead-acid battery failure and damage is that the battery itself cannot avoid vulcanization.　　 The second reason: the performance of batteries that do not contain cadmium will decrease. Cadmium is a toxic element. The current battery industry in China is completely 'banning cadmium'! In other words, lead-acid batteries containing cadmium can enhance battery conductivity, reduce battery internal resistance, improve battery discharge voltage, and resist high and low temperatures. Good charging and discharging performance and long life. Because cadmium is toxic and pollutes the environment, once the cadmium is not used, the performance of the battery is slightly worse than before, which has caused many dealers to feel that the quality of the battery is not as good as before! There will be a synthetic non-toxic metal in the future. The effect of cadmium, so that the battery performance is the same as before. It is better to wait for that element to be found. It is estimated that the lead-acid battery will be eliminated early! 　　 The third reason: the improper use of electric vehicles causes the temperature to be too high or too low: lead-acid battery capacity, continuation The mileage is directly proportional to the outdoor temperature. When the temperature is around 25°C, the new battery can run 45-50 kilometers. As the temperature drops, the mileage will decrease by 0.8%-1% for every 1°C drop. And long-term charging at high temperatures will also cause the performance of the battery to decline and shorten the life span.　　Charger problem: Sometimes the battery is not fully charged due to a charger failure. When the charger's converter is damaged, or the charger's insurance is burned out, the power cord and the battery socket are disconnected, or the contact is poor, the battery will not be charged. In fact, there is no problem with the battery. The fourth reason: The removal of the speed limiter has caused most car controllers to have a speed limit plug. Some manufacturers or dealers simply remove the speed limiter. This can attract customers who value speed and reduce costs. The current is very large when the car is driving at high speed, which will seriously shorten the battery life.　　Fifth reason: long-term use of fast charging equipment 　　The normal battery life of the industry is about 1-2 years, but the battery that is often charged at the fast charging station, if it can be used for more than 1 year, it is definitely a miracle. It is an indisputable fact that fast charging stations will accelerate battery aging. The dealer is most afraid of encountering such a situation. The damage was originally caused by fast charging, but the dealer has to guarantee it. Fast charging will cause the battery plate to warp and deform, increase the acid concentration and other consequences, thereby accelerating the aging of the battery and shortening its life. Previous: Why is the electric vehicle battery hot?