Byd switched from lead acid batteries to lithium iron phosphate batteries, starting the battery field will face a major change!

According to data released by the Traffic Management Bureau of the Ministry of Public Security, by September 2021, there were 390 million motor vehicles in China, including 297 million cars. If every car carrying lead-acid batteries were replaced with iron lithium batteries, it would be a great help to the environmental cause to reduce the harm caused by battery pollution.

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If you pay close attention to the recent trends in the auto industry, you will find a relatively similar phenomenon, that is, every auto company will mention a word -- "green" at the same time when releasing the latest strategy or new technology. In order to protect the environment, even globally, there have been a number of car companies have given a clear timetable to stop/sell fuel cars, in order to show that their environmental cause is not just lip service.

In fact, a far more pressing environmental problem than full electrification is the start battery (lead-acid) installed in existing cars. Because the price is relatively cheap, and has been born for hundreds of years, relatively mature technology. Therefore, the vast majority of cars on the market are equipped with start batteries are lead-acid batteries.

Since the vast majority of lead-acid batteries last only about two years, discarded lead-acid batteries replaced in cars are a huge source of pollution. About 3 million tons of lead-acid batteries are decommissioned in China every year, according to Liu Yong, secretary-general of the Energy Storage Application Branch of the China Chemical and Physical Power Supply Industry Association.

Data shows that the electrode of lead-acid battery is mainly made of lead and its oxide, and the electrolyte is a kind of battery with sulfuric acid solution. In the discharge state of lead-acid battery, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead. In charge state, the main components of both anode and cathode are lead sulfate. Sulfuric acid and lead in discarded lead-acid batteries are harmful to water and land. The heavy metal lead and sulphuric acid from lead-acid batteries leak out, enter the soil and water, and enter the food chain through a variety of ways. After the pollutants enter the human body through food, they will cause chronic poisoning of some organs in the human body, and then endanger life.

Waste lead-acid batteries pose a serious environmental hazard, but according to an investigation by Xinhua reporters earlier this year, recycling of waste lead-acid batteries in the current market is not standardized, causing serious environmental pollution.

According to the report, citing industry sources, only a small portion of the waste batteries collected by the "guerrilla" recyclers are sold to qualified recycling companies, and most of them are processed in small underground workshops. These small workshops left the lead plate and dumped the acid directly, which not only had low utilization rate, but also seriously polluted the environment.

Although this situation has long been an open "secret", there has been no substantial improvement in recent years.

Byd recently announced a complete switch from lead-acid to iron-lithium batteries in its plug-in hybrid models. The long-term environmental pollution problem of lead-acid batteries is pushed to the front again.

Although only the above short sentence, but to change the lead acid battery pollution of environmental problems of great significance. First of all, as a battery and vehicle manufacturer, BYD's move has more practical significance. If most of the previous automakers were based on the lack of a more suitable alternative to lead-acid batteries, byd's iron lithium battery solution is also a new option.

Secondly, from the technical point of view, compared with lead-acid batteries, iron lithium batteries will not cause serious pollution and harm in the process of production and recycling. Because iron lithium battery has a high cycle charge and discharge times, so the life cycle can cover the whole vehicle life cycle. Cars equipped with lithium-iron batteries do not have to change their batteries as frequently as lead-acid batteries.

In addition, BYD through the improvement of the battery management system, the system can also automatically detect the small battery power, through the large battery to automatically supplement the small battery power, to ensure that the car "small battery" will not be short of electricity.

Lithium-iron batteries weigh less than 10 kilograms compared to ordinary lead-acid batteries. Light weight, small size is also more conducive to the vehicle layout.

In fact, in the field of power batteries, lithium iron phosphate batteries are becoming the mainstream.

Especially when THE BYD "blade battery" comes out, with the same range as ternary lithium, the safety characteristics of no spontaneous combustion, so that the loading capacity of lithium iron phosphate battery has been rapidly improved. According to data from China Automotive Power Battery Industry Innovation Alliance, as of September 2021, the loading volume of lithium iron phosphate has increased by 309.3% year-on-year, accounting for 60.5% from 34.8% in the same period last year.

At present, in addition to BYD, a number of mainstream brands of new energy vehicles, including Tesla, NiO and Xiaopeng, have begun to offer models equipped with lithium iron phosphate batteries.

As iron lithium battery began to cover the start battery field, this is undoubtedly a significant change in the domestic automotive industry start battery pattern. At the same time, also the echo each other at our national leaders at the g20 leaders clearly put forward by the 16th summit "China will continue to promote energy, transformation and upgrading of industrial structure, promote green, low carbon technology research and development application, for the global response to climate change and promoting energy transformation efforts to make a positive contribution" commitment.