Traditional lead acid battery. Lead-acid batteries have lower specific energy, and the overall quality and volume required for new energy vehicles are relatively large. The journey of one-time charging can be short; the service life is short, and the cost of later use is high. In addition, lead-acid batteries have a long charging time, lead is heavy metals, and there is pollution, which runs counter to the concept of new energy vehicles. Lithium batteries are widely used in mobile phones, computers and other equipment. The fuel cell was born for the electric/hybrid car. Electrical energy is generated by the oxidative reaction, and the combustion products are water and a very small amount of carbon dioxide, and have almost no effect on the environment. So for electric vehicles, what about lithium batteries or fuel cells? No one is conclusive, but we can understand these two types of batteries through the following sets of comparisons. cost The high cost and complicated hydrogen production process have become major obstacles to the development of fuel cells. Hydrogen is obtained by electrolysis or steam recombination. However, these two methods are costly, and the cost of producing the same quality of natural gas is 1/2 or even 1/3 of that of hydrogen. Lithium-ion batteries are relatively inexpensive to produce, and their recharge utilization is very convenient, which is more cost effective than other portable energy sources. environmental impact Fuel cells and lithium-ion batteries have little impact on the environment. The former combustion product is water and does not produce greenhouse gases generated after gasoline/diesel combustion. The discharge product of a lithium ion battery may be caused by lithium oxide, lithium hydroxide, etc., and does not affect the environment. In addition, lithium ion batteries can be reused. Based on the above points, these two types of batteries have become the most popular electric vehicle power source. material In the fuel cell, a polymer film is used as an electrode to support the hydrogen and oxygen reaction to generate electric energy. Polymer films must be specially processed to withstand high temperatures and mechanical stresses. Lithium ions in lithium-ion batteries are capable of adsorbing charges, so batteries have the ability to store electricity. The quality of lithium ions is very light, so it is an ideal power source for automobiles. potential Regardless of the fuel cell or the lithium-ion battery, there is still a lot of room for improvement in related technologies. If the cost of a fuel cell can be reduced, it can truly be used as an alternative energy source for gasoline/diesel fuel. For lithium batteries, if the energy density can be further improved and the cycle life can be longer, it is also an excellent driving energy source. challenge For fuel cells, there are still many technical problems waiting to be solved. For example, the high cost of platinum catalysts, the complicated process of sealing technology, the large size of hydrogen storage tanks, and the long startup time. The problem with the development of lithium-ion batteries is the low level of charging infrastructure. Therefore, this problem will be solved as soon as a good charging facility and charging network are established. Recently, Toyota, Honda, Mitsubishi and Nissan have signed agreements to build charging facilities and build charging networks in Japan. Plug'n Drive recently also established its charging network in Ontario, Canada... these are all lithium batteries. The technical application laid the foundation.
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