As the global energy crisis intensifies, the automobile industry, which consumes a large amount of oil, is slowly transforming, and the development of new energy vehicles is in full swing. As an important component of new energy vehicles, the power battery industry has suddenly emerged. Especially in the past few years, various power batteries have been competing for dominance. Power batteries such as lithium cobalt oxide and lithium manganate that were the first to enter the market are slowly fading out of the market due to various shortcomings. Now the market is mainly left with ternary lithium batteries and lithium iron phosphate batteries competing for supremacy. So, which batteries will replace existing products and dominate the market in the future? BYD gave us the answer.
The Past and Present of Blade Batteries
BYD’s earliest engagement in the R&D and production of new energy vehicles can be traced back to its acquisition of Qinchuan Automobile in 2003. In 2005, BYD’s first lithium iron phosphate power The battery was officially launched and became the industry leader in one fell swoop. In June 2020, BYD will launch a new model - BYD Han. This pure electric model will be equipped with blade batteries. As the name suggests, the blade battery is to make the battery core into a "blade" shape, which can be customized according to the size of the battery pack, and the length can reach 2 meters. This allows the blade batteries to directly skip the "module" when forming a group and directly form a battery pack. For the pure electric vehicle industry, blade batteries are a disruptive breakthrough.
Blade Battery Conquers "Acupuncture Test"
In the new energy vehicle market, what consumers are most worried about when buying a car is the safety of the power battery. Due to the special material and structure of the power battery, it cannot be deformed or squeezed by external forces. Therefore, many consumers will tend to buy models from big brands, hoping that the quality of their products will be excellent.
The electrode material of BYD's blade battery uses lithium iron phosphate with small volume change and stable structure. The outside of the battery uses all-round high-temperature "ceramic battery" technology, with an insulating coating that is resistant to high temperatures and has excellent insulation properties. , which can effectively isolate the heat generated inside the battery. Coupled with the special tab mechanism design, the probability of internal short circuit is extremely low. The blade battery adopts an integrated design with few overall structural parts, simple wiring harness arrangement, good stiffness and high modality. Numerous advantages ensure the ultra-high safety performance of blade batteries.
The volume energy density of the blade battery is very close to that of the 811 ternary lithium battery. So some people are worried about whether there will be safety hazards when arranging large energy density batteries in such a small space? My answer is no. The blade battery is made of lithium iron phosphate material. Its stability is much higher than that of lithium batteries. It can effectively avoid the safety hazards of 811 ternary lithium batteries and can also increase the cruising range of new energy vehicles. The blade battery can meet a range of 600 kilometers on a single charge, ensuring the high endurance performance of the blade battery.
In order to verify the safety of power batteries, the automotive industry has developed more than 300 types of tests, among which the pinprick test is known as the most difficult experiment to pass. There is even a saying in the industry that acupuncture testing has blocked the development of automotive power batteries, and acupuncture testing was once shelved. So how does BYD Blade Battery pass the pinprick test? What is the effect? The following are the details of the acupuncture test:
Under the same test conditions, the ternary lithium battery experienced drastic temperature changes at the moment of acupuncture, with the surface temperature rapidly exceeding 500°C and extreme thermal runaway. It began to burn violently, and the eggs on the surface of the battery were blown away; the traditional lithium iron phosphate battery had no open flame after being penetrated, and smoke was ejected from the battery pressure relief valve. The surface temperature reached 200℃-400℃, and the eggs on the surface of the battery were blown away. High temperature and scorching; BYD blade battery has no open flame or even smoke after penetration, and the eggs on the battery surface remain unchanged. The most eye-catching performance is that when the blade battery is punctured, there is no abnormal behavior, not even smoke, and the structure is still stable. The temperature sensor shows that the temperature of the battery surface is only about 30°C, even lower than in summer. The highest ground temperature in Beijing is 70°C.
The experimental results prove the safety, stability and superiority of BYD's blade battery.
BYD's blade battery has many advantages in terms of safety structure and experimental testing. When it is combined with the vehicle, the advantages are naturally undoubted. It enhances vehicle safety, expands vehicle space, and optimizes vehicle safety. The overall vehicle layout is improved and the cruising range is improved. This is a milestone for the safe development of the power battery industry. It can be said that the release of the blade battery has led the global power battery to a new height.
The market prospect is limitless
BYD's first pure electric model equipped with blade batteries is the BYD Han, which shows that BYD attaches great importance to this blade battery.
After years of development, new energy vehicle power batteries have continued to use the traditional model. While other manufacturers are looking for new materials to replace them, BYD uses existing materials and completely changes the overall performance of the battery by changing the process. This subversive power battery manufacturing model is worthy of study and reflection by all new energy vehicle manufacturers.
It is foreseeable that the advent of blade batteries will change consumers' perception of traditional car batteries, and its impact on the future new energy vehicle market will be immeasurable.
This article is the original work of Auto Observer. Any plagiarism will be investigated according to law.
(Operator: He Shuguang)
This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.