What causes the electric vehicle lead-acid battery’s life so short?
When you buy an electric vehicle, the clerk will tell you that the lead-acid battery can be used for over two years. However, finally batteries are dead after one year. Why? Then you may go back to ask the clerk why its life is only one year rather than two years. He will tell you that you don’t use your batteries properly. How to use may be called “properly”? And do you know the reason why the electric vehicle lead-acid battery’s life is so short? Here are some reasons that I summarize as following.
First, lead-acid batteries’ operating principle may shorten its life. There is a chemical change in its charge or discharge process. They change from lead oxide when charged to lead sulfate when discharged. If they remain in the lead sulfate state for a few days, some part of the plate doesn’t return to lead oxide when the battery is recharged. And if the battery remains discharged longer, a greater amount of the positive plate will remain lead sulfate. The part of the plate that becomes “sulfated” no longer stores energy. So if you find some impurities in the plates, it means that your battery has been sulfated, and this also shows that the life of your battery would be shortened slowly.
Next, it is the specific working environment of electric vehicle. Batteries that are deeply discharged when you use the electric vehicle are not able to be charged in time, so this adds lead sulfate density which cause severely sulfated. Because electric vehicles are often used, so the frequency of charge – discharge is very high, and this also may reduce its life. Besides, the electric vehicle is charged in a short time then still used normally. The short charge will aggravate lead-acid batteries’ sulfate.
There are other reasons, such as lead-acid batteries’ themselves structure, electric vehicle’s structure, charging equipment, which all may affect their life. Now you know these reasons which influence your batteries’ life, so you should maintain your lead-acid batteries in a regular basis which may prolong their life.
Source: www.leoch.com
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