Is BYD and Contemporary Ampere Technology Co., Ltd. a farce or a comedy? At least for you and me, this is a kind of "blessing"

"Tit for tat" has always been a topic in manufacturing industry. It is the confrontation between these enterprises that makes our consumers enjoy more affordable and reliable products. But perhaps everyone did not expect that BYD and Contemporary Ampere Technology Co., Ltd. set off the biggest "tit-for-tat" in the history of China power battery industry.

It all started with BYD's "Blade Battery" conference. ...

On March 29th, BYD officially launched the blade battery that subverted the industry. At the press conference, BYD put ternary lithium battery, lithium ferrous phosphate block battery and its latest blade battery together and made a comparative experiment of "acupuncture test". The results show that the ternary lithium battery burns violently during the test, and its surface temperature exceeds 500 degrees Celsius. Lithium ferrous phosphate bulk battery has no open flame and smoke, and its surface temperature is 200-400 degrees Celsius. The latest BYD blade battery has no open flame and smoke, and its surface temperature is about 30 degrees Celsius, which shows the excellent safety performance of BYD blade battery under extreme conditions.

However, security must be reflected by comparison. In the "acupuncture test", ternary lithium battery is the worst and most dangerous. Since the disadvantages of ternary lithium batteries are so vividly displayed, whose cheese did this move? As a leading enterprise in the field of ternary lithium batteries, Zeng Yuquan, the chairman of Amperex Technology Co., Ltd., said at the 20 1 9 annual performance briefing held on May19 that "blade battery is one of the innovative concepts of CTP structure in its mass production in 20 16" and pointed out that "battery safety and battery abuse test are two different things, and some people equate the passing of abuse test with batteries. The subtext is that BYD's test is not standard and has no scientific basis.

Then, Li Yunfei, BYD's vice president of sales, directly pointed to the dark war on Weibo: "Not satisfied? Let's try one! "

1. Quite a "farce" rebuttal.

On May 22nd and 23rd, Contemporary Ampere Technology Co., Ltd. released two test videos, which proved that its battery could pass the acupuncture test.

On May 22nd, Contemporary Amperex Technology Co., Ltd. released the acupuncture video, adopting the self-made "Acupuncture Test Standard 1.0", that is, the steel needle pricks at the battery pack (but not at the battery cell), and the steel needle breaks when pricking at the battery pack, which does not penetrate the battery cell or cause a fire. Use this kind of cold joke to explain that "it doesn't matter whether it is fried after acupuncture, but it does matter if you don't go in." But this is completely contrary to the starting point of the international standard "acupuncture test". "Acupuncture test" is to detect the actual situation when the battery is short-circuited, which is also the last guarantee to ensure the safety of drivers and passengers. Therefore, the key point is not whether it can be punctured, but whether it can protect the safety of personnel after puncture. In the first round, the counterattack of Contemporary Ampere Technology Co., Ltd. ended in farce.

On May 23rd, Contemporary Ampere Technology Co., Ltd., who knew his joke yesterday, released the second video of acupuncture test. However, unlike BYD's open and transparent "acupuncture test" for the national audience at the press conference, the video shooting angle and definition of Contemporary Ampere Technology Co., Ltd. are not completely convincing. As for whether the steel needle pierced the battery, whether it was "through-point acupuncture" or "skin acupuncture", it is still unknown, so Scouts will not make more comments on this video.

Then, on May 24th, Contemporary Ampere Technology Co., Ltd. called on the new national standard "Safety Requirements for Power Storage Batteries for Electric Vehicles" to cancel the acupuncture test, which meant avoiding risks.

Objectively speaking, although the rebuttal of contemporary Amperex Technology Co., Ltd. is a little funny, it is actually the characteristics of different products. Ternary lithium batteries are prone to safety accidents, while lithium ferrous phosphate used in BYD blade batteries is relatively stable in terms of battery characteristics. BYD's move is to prevent the explosion of ternary lithium battery from endangering the safety of drivers and passengers.

2. At present, "blade battery" is indeed safer.

In fact, it can be understood from the news of spontaneous combustion of electric vehicles equipped with ternary lithium batteries in recent years that the stability of ternary lithium batteries is poor, and because of its particularity, ternary lithium batteries can hardly be put out once they catch fire, so they can only wait for them to burn themselves clean. On the other hand, lithium iron phosphate battery uses lithium iron phosphate as the cathode material of the battery. Even in case of fire, lithium iron phosphate batteries are easier to handle. In addition, the "blade battery" designed and manufactured by BYD has a larger loop between the positive and negative electrodes and a larger heat dissipation area in the shape of a blade. In addition, it is an indisputable fact that lithium ferrous phosphate has a higher thermal runaway temperature than ternary lithium batteries.

It is worth mentioning that in the summer of 2020, the spontaneous combustion of electric vehicles began to occur gradually. 12 In May, the Ministry of Industry and Information Technology issued three documents and a series of mandatory standards for electric vehicles, one of which required that the battery system should not catch fire or explode within five minutes after the thermal runaway of the battery unit, so as to reserve a safe escape time for the occupants. As far as the current technology is concerned, it is really difficult for ternary lithium batteries to meet this requirement, but BYD's "blade battery" can easily meet this requirement.

Although it can't be concluded that the ternary lithium battery has no future, or the future is uncertain, BYD adopts the "blade battery" of lithium ferrous phosphate, which basically solves the problem of insufficient energy density of lithium ferrous phosphate and ensures higher safety, and is bound to become a new direction for future car companies to purchase. For example, Changan and other car companies will carry the "blade battery" provided by BYD on new energy vehicles in the future.

Conclusion:

New energy electric vehicles will be the mainstream development direction in the future, and the safety of electricity consumption and vehicles has become a problem to be solved by battery suppliers and car companies. For our consumers, "tit for tat" is undoubtedly a great blessing. If there is no "tit for tat", BYD will not bring us the safest "blade battery".

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.