"Erase the word'self-ignition' from the dictionary of new energy vehicles." On March 29, Wang Chuanfu, Chairman and President of BYD Group, shouted out the heart of many new energy vehicle consumers at the "Blade Battery" press conference. . This sentence, which has never been shouted before, is likely to promote safety changes in the electric vehicle industry.
1"Blade Battery" passed acupuncture experiment for the first time in the industry
At the press conference, BYD played a comparative video of three battery acupuncture experiments. Under the same test conditions, the ternary lithium battery experienced a drastic temperature change at the moment of acupuncture, the surface temperature quickly exceeded 500 ℃, and extreme thermal runaway violent burning occurred, and the eggs on the battery surface were exploded; traditional block phosphoric acid After the iron-lithium battery is punctured, there is no open flame or smoke, and the surface temperature reaches 200℃～400℃, and the eggs on the battery surface are scorched at high temperature; the "blade battery" has no open flame and smoke after penetration, and the battery surface temperature Only about 30-60°C, the eggs on the surface of the battery have no change, and they are still in a flowable liquid state.
This set of comparative experiments shows that BYD's "blade battery" has got rid of the potential "thermal runaway" hazards of traditional power batteries, and the battery's safety and stability have unique advantages. Ouyang Minggao, an academician of the Chinese Academy of Sciences, analyzed and pointed out that the design of the "blade battery" makes it produce less heat and quickly dissipate heat when it is short-circuited, and its performance is "very excellent."
It is understood that the acupuncture test is a test method that simulates an internal short circuit of a lithium-ion battery, causing thermal runaway, and then explosion and fire. It should be pointed out that due to the stringent standards of the acupuncture experiment, neither the ternary lithium battery nor the lifepo4 battery can pass the experiment. Therefore, the state temporarily regards the acupuncture test as a non-mandatory standard and does not make it a mandatory requirement. Nevertheless, BYD's "blade battery" challenged the acupuncture experiment and passed it perfectly. BYD's "blade battery" successfully passed the acupuncture experiment, which undoubtedly endorsed the safety of domestic electric vehicles.
2 "Blade Battery" has one position ahead of the opponent
Although the sales of electric vehicles have continued to increase in recent years, the three original sins of short battery life, potential safety hazards, and difficulty in charging have caused more consumers to stay away from electric vehicles. Moreover, potential safety hazards have become the first sin of electric vehicles.
In 2019, there have been many safety accidents in domestic electric vehicles, and spontaneous combustion has become the most important safety hazard. Data compiled by the car portal shows that vehicles equipped with ternary lithium power batteries account for more than 85% of spontaneous combustion vehicles, while vehicles equipped with lifepo4 batteries account for only 7%. In the opinion of Yang Yusheng, an academician of the Chinese Academy of Engineering, the first reason for the frequent burning of electric vehicles is battery technology.
At present, ternary lithium batteries and lifepo4 batteries have become the two most important power battery choices in the power battery market. In contrast, the ternary lithium battery has a higher energy density, but it is less safe. Affected by national policies, the excessive pursuit of high energy density for ternary lithium batteries has led to a rapid decline in safety, and finally triggered many spontaneous combustion incidents in 2019. Although the energy density of lithium iron phosphate is low, it has inherent advantages in terms of safety and stability. The "blade battery" that passed the acupuncture experiment this time is the latest super lifepo4 battery developed by BYD.
As the world's largest manufacturer of lifepo4 batteries, BYD has been committed to the research and development of lifepo4 batteries for a long time and has deep accumulation in the technical reserves of lithium iron phosphate batteries. It is reported that BYD’s “blade battery” BYD uses a full range of high-temperature “ceramic battery” technology, and uses high-temperature ceramic coatings with excellent high-temperature resistance and excellent insulation properties at high-risk safety points, which greatly improves the safety and stability of the pool. . And this is where BYD’s “blade battery” dared to challenge the acupuncture experiment.
No matter other countries or regions have different standards, as BYD’s internal evaluation, we still insist on using the most demanding standards in electric vehicle batteries to measure our batteries, especially blade batteries. The safety standard is the first priority, especially the acupuncture standard. "In Wang Chuanfu's view, the safety of electric vehicles comes first.
3 The energy density of the "blade battery" has been comparable to that of a ternary lithium battery
In addition to unparalleled safety accidents, the "blade battery" has also made major breakthroughs in the manufacturing process, energy density, manufacturing cost, and lightweight, and its advantages have further emerged.
The “blade battery” uses a large battery cell developed by BYD itself, but the cell shape is flatter and narrower (the long side can be customized and the maximum stable length of the single-cell can reach 2100mm), arranged together in an array, just like “ The blades are inserted into the battery pack as well. This allows the blade batteries to skip the “modules” and directly from the battery pack when they are grouped.
Through structural innovation, the "blade battery" can skip the "module" when forming a group, which greatly improves the space utilization of the battery pack, and finally achieves the design goal of installing more batteries with the same volume. Compared with the traditional battery pack with modules, the volume utilization of the "blade battery" has increased by more than 50%, and the cruising range has reached the same level as that of a high-energy ternary lithium battery.
Not only that, while the “blade battery” greatly improves the mass-energy density and volumetric energy density of the system, it removes the “module” layer of the intermediate structure, thus greatly reducing the complexity of the battery system, which in turn brings higher Stability and lower failure rate, while reducing weight.
Industry insiders pointed out that the BYD super lifepo4 battery system based on "blade battery" technology can already rival the mainstream ternary batteries on the market in terms of energy density. At the same time, the cost of lithium iron phosphate batteries is lower, and the safety and stability are stronger. It will further make the cost more competitive.
According to Wang Chuanfu, blade batteries are only used in BYD Han pure electric models, and there are no plans for other models. BYD Han EV, as the flagship sedan dominating the "Dynasty Family", has a cruising range of 605 kilometers under comprehensive working conditions and an acceleration of 3.9 seconds per 100 kilometers, deducing a new family design language in the vehicle design, especially the interior part. , Depicting the future of BYD brand towards luxury and unremitting technological innovation.
4 "Blade battery" will promote diversified competition in power battery technology
It is worth noting that the "blade battery" released by BYD this time was launched by BYD's Verdi Battery Company. This is an independent battery manufacturing entity established by BYD after splitting its power battery business. Wang Chuanfu said at the press conference that the "blade battery" is also Fordy's first product.
Not long ago, BYD has established five Verdi-based companies. This marked the completion of BYD’s business spin-off for core components of new energy vehicles. In the future, BYD's new energy auto parts business will independently supply externally. The main business of Fordy Battery, one of the five Fordy companies, is the research and development, design, and production of power batteries. At present, the "blade battery" has been approved by the OEM.
"Almost all car brands you can think of are discussing cooperation plans based on blade battery technology with us. I believe you will soon see and hear more exciting news about blade batteries." BYD Group Vice President and Verdi He Long, chairman of the battery, said. We have noticed the fact that in the latest new energy vehicle declaration information, many car companies have declared the version equipped with lithium iron phosphate batteries.
It is foreseeable that with the increasing market participation of Fordy's lithium iron phosphate blade batteries, many new energy vehicles in the future will be equipped with BYD "blade batteries" that are safe and stable, with higher energy density but cheaper prices. This move, which is sufficient to change the competitive landscape of power batteries, is likely to promote a revolution in the new energy automobile industry.
Written at the end:
“Blade batteries will change the industry’s reliance on ternary lithium batteries, bring the power battery technology route back to the right path, and redefine the safety standards of new energy vehicles.” As BYD Chairman Wang Chuanfu said: “Today’s blade batteries are provided by BYD. A great gift for the industry.” It can be seen faintly that BYD’s “blade battery” will lead the world to a new level of power battery safety.
