How is NiMH better than lithium batteries?

Take the early motorcycles to talk about the Japanese style of doing things first. In the 1990s, motorcycles were always started with a foot starter lever, which means that they had to use their feet to drive the car very hard. Regarding some old and weak groups, It is difficult to start the motorcycle. Later, the Taiwanese invented the starter motor, installed a DC motor for the engine, and used the battery to drive the engine to start, simply by installing a button. However, Wuyang Honda, the leading leader at the time, did not install this accessory for a long time, and has been using the foot starter. They should think this new thing is not mature enough, so after a long delay, they found that everyone generally accepts this new one. The startup method was finally improved. A small motorcycle is so cautious. As for cars with higher reliability requirements, the Japanese will of course not easily make changes. Lithium batteries have a large capacity, but the hybrid is still driven by an engine. From this point of view, the advantages of lithium batteries are not very clear to Ni-MH. For example, P4 uses a lithium battery, which is only 10 kilograms lighter than Ni-MH, and the overall weight reduction is not too much. After Panasonic acquired Sanyo, all nickel-metal hydride technology was in the hands of Panasonic. Toyota has been cooperating with Panasonic on this project. The Prius has been on the market for more than 20 years. The product is relatively stable and reliable. I have never heard of battery explosion or recycling. It's just a replacement of the battery once it's opened until it is scrapped. Of course, there is no need to toss about this matter. From a safety point of view, no matter how you play with NiMH, the lithium battery will not catch fire. Just imagine that the battery of a hybrid car is usually installed under the seat. If it is a large lithium battery, if you know the truth. , I really won't feel too peaceful in my heart. In the event of an impact, even if it is a combination of lithium battery masters like Tesla, there will be accidents, but for so many years, there has been no news report of similar fires and explosions on the Prius, and it is indeed the credit of the nickel-metal hydride battery. Hybrid requires the battery to be charged and discharged repeatedly. If the Ni-MH battery is controlled between 40%-60% of the capacity, it can be charged and discharged tens of thousands of times, and its life span is much longer than that of a lithium battery. The general charging and discharging cycle of lithium batteries is about 500 times, while the nickel-metal hydride battery can do 2,000 times, and the vehicle-mounted battery will of course be higher. Lithium batteries have very high requirements for the management system. To protect the board and various balancing devices, there will be problems with slight differences in the consistency of the monomers. Toyota’s nickel-metal hydride battery packs can be as low as the sky and hundreds of batteries are connected in series without the need for balancing circuits. This is like the situation that domestic two-wheeled battery cars have been using lead-acid batteries in large quantities. They are simple and easy to use. I like it. Low temperature is also the fatal killer of lithium batteries. Some friends have tried to power outdoor lithium battery wireless monitoring system. The lithium battery supplied by the manufacturer is nominally capable of working at minus 20 degrees, but actually it can’t work normally at minus 18 degrees. The battery capacity Only 12%, almost all mobile phones cannot work normally for more than 5 minutes at minus 20 degrees. Many pure electric vehicles that use lithium batteries cannot be used normally in the north, because the battery capacity has dropped sharply, and the electric heating cannot be run at all because of the sharp decline in battery capacity. Automobiles are durable goods. Generally, start-up batteries can last for 3 years, while for new energy vehicles, batteries generally need to be reliable for 10 years and hundreds of thousands of kilometers. It takes a long time for a product to go from research and development to market launch. The road test of time can be given to consumers, and consumers will have to use for many years before they can find the problem. Since the nickel-hydrogen battery is very mature in the traditional hybrid, the price is cheap, usually a few thousand yuan. So, the fuel money saved will soon be recycled by users, and consumers have already recognized it. Moreover, the supply chain of the automotive industry does not mean that adjustments can be changed immediately, so why bother to replace lithium batteries. At present, it seems that only Toyota is still using Ni-MH on the market. This is because it was the first to market this type of product. The design was early, taking into account the characteristics of the battery and the precise mechanical coordination, and it applied for a patent. Other manufacturers This barrier can only be avoided, and now lithium batteries have begun to mature and cheap, so why bother to go this old way. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Why hasn't graphene batteries become the dominant battery for electric vehicles?