Why don't electric car batteries last?

Why are all aspects of electric vehicles improving, but the quality of batteries is not as good as before?

Truth One: High EV Configuration Causes Battery Pressure Increase

Compared with the previous electric vehicles, they have higher configuration, higher power and faster speed, so they consume more electricity. In addition, the electric tires are thicker and thicker than before, which all consume more electricity. Moreover, many electric devices have been added to the electric vehicles, such as anti-theft devices, remote start-up, daylight, music broadcasting. Placing, bucket lamp and so on, all of these increase the load of the battery and affect the performance of the battery.

Truth 2: Cadmium-free technology of batteries, which greatly reduces the performance of batteries

Cadmium is an excellent metal for neutron absorption. Lead-acid batteries containing cadmium can enhance the conductivity of batteries, reduce the internal resistance of batteries, improve the discharge voltage of batteries, withstand high and low temperatures, have good charge-discharge performance and long life. Therefore, previous batteries were all cadmium-containing, but cadmium polluted the environment and caused great harm to human body. The "Access Conditions for Lead-acid Battery Industry" officially implemented in July 2012 clearly prohibits the production of lead-acid batteries containing cadmium from January 1, 2014, and prohibits the use of externalization technology for new and expanded projects. 100% of lead-acid batteries sold on the market do not contain cadmium. Once cadmium-free batteries are not used, their performance will certainly be slightly worse than before, which leads to the feeling that many people think the quality of batteries is not as good as before.

Truth 3: Electric vehicle motor power increases, battery damage increases

As we all know, the electric vehicle motor power sold in the electric vehicle market in the past few years is relatively small, the small power is mainly 250W, and the high power is mainly 500W. In recent years, in order to pursue faster speed and improve motor power, the minimum power of electric vehicles has basically reached 500W, and 800W and 1200W motors are also common. It is undeniable that the higher the motor power, the faster the speed of electric vehicles will be, but it will also accelerate the loss of battery life.

Truth 4: Electric cars are getting heavier and more power-intensive

Prior to 2014, with the increasing demand for comfort, the proportion of luxury models on the market is increasing. The weight of luxury models is increasing significantly, the power consumption is increasing, and the mileage and service life of electric vehicles will decrease.

Truth 5: Bad charging habits affect battery performance

Batteries are in a long-term power shortage, fast charging station charging, long-term charging, misuse or use of inferior chargers, and so on. These bad charging habits will affect the performance of batteries, serious leakage or charging deformation of batteries.

Truth 6: Bad cycling habits affect battery performance

Daily cycling habits also have a certain impact on the battery life of electric vehicles. Driving at a uniform speed and less braking are the best protection for batteries. When starting a pedal-powered electric vehicle, the pedal should be used to start it, so as not to damage the battery due to excessive discharge current. Slow down on uneven roads. If the battery is not enough, charge it. Don't run out of electricity.

Truth 7: Renovation of batteries floods into the market potential rules

There are a large number of fake batteries in the current market, especially in the three or four-line regional market. Illegal vendors recycle waste batteries with relatively new appearance at a low price, and then proceed with the process of adding liquid, repairing, shell renovation, and repackaging, which quietly flows into the marketing chain. This is one of the important reasons why many people change their batteries and they usually have only one year life.