After the battery life is over, the car battery needs to be replaced, which also involves a lot of expense. Regarding the most common and widespread ternary lithium batteries and lithium iron phosphate batteries currently on the market, lithium iron phosphate batteries are relatively cheap, but are not resistant to low temperatures. Low temperatures will seriously affect the battery. A replacement costs about 30,000-50,000 yuan: while ternary lithium batteries are relatively cheap. Lithium-ion batteries are not resistant to high temperatures but have high charging efficiency, and a replacement costs about 50,000 yuan. And if Tesla owners are affected by tariffs and shipping imports, a replacement will cost more than 300,000 yuan. These prices have deeply influenced drivers to choose pure electric vehicles. Recently, Nissan announced that its leaf battery technology has made a major breakthrough, and the maximum average life span will be extended to 12 years. After collecting data on Nissan's leaf released in Europe in 2011, it was found that the average life of these cars is 10 years, and the average life of the on-board battery pack is 22 years. The battery pack only loses part of its capacity after aging, and it will take a while to slowly reduce until it loses all its capacity. News of the battery life breakthrough is good news for consumers looking to buy an electric car, but there are also solutions for those who have already purchased one. Batteries removed from electric vehicles can still be used as stationary power sources. In 2018, Nissan used 148 leaf batteries (all good second-hand batteries) to power a football stadium in Amsterdam, and even used leaf batteries to power campers. These are the "second life plan" of electric vehicle batteries. . One advantage of using stationary batteries as a power source is that they can facilitate the use of renewable energy. Renewable energy sources like wind turbines and solar panels can produce more electricity than daily needs. Stationary batteries can store electricity for later use, allowing buildings to use renewable energy even when the sun or wind isn't shining. Nissan currently sells home solar panels and stationary battery packs in Europe, and Tesla is commercializing the idea and selling home energy products in the United States. Nissan is also testing how electric vehicles can perform "power balancing" technology, which absorbs excess power during periods of low demand and discharges it during periods of high demand to reduce consumption. This approach saves wear and tear on grid infrastructure. Nissan said that a pilot project in Denmark, in partnership with Italian energy company Enel, can provide electric vehicle owners with car batteries for up to 1,300 euros (about 10,000 yuan). The automaker claims the Leaf has received "Energy Factory" certification in Denmark, as well as Germany and the UK. In addition to saving money for car owners this time around, this increase in battery life can also create benefits for car manufacturers and dealers through new uses for electric vehicle batteries. Electric vehicles require less maintenance than internal combustion vehicles, which means dealers have less opportunity to profit from repairs. But new forms of revenue from batteries can help make up for the shortfall. Nissan isn't the only automaker considering potential uses for batteries beyond electric vehicles. Nissan partner Renault is using electric car batteries to power two islands, while General Motors and Toyota are experimenting with the use of secondary batteries, with the latter using hybrid vehicles of battery. Hyundai expects that its electric vehicles will cause pollution from a large number of idle batteries, and is also actively looking for relevant ways to solve this problem.

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