What are the advantages of BYD Blade Battery? Although the road to independent research and development is difficult, it is really strong

BYD's new Han was finally launched two months ago amidst everyone's expectations. Three of the four versions of the Han are pure electric models, once again demonstrating BYD's emphasis on the field of electric vehicles.

Also listed with Han is BYD's latest masterpiece in the battery field - the blade battery. In its promotion, BYD used the slogan "safer, more reliable, longer life". I don't know what the blade battery is. A real talent is still just talk without practice.

What is a blade battery? ?

The batteries of electric vehicles are now mainly divided into two categories, one is ternary lithium battery, and the other is lithium iron phosphate battery.

Ternary lithium battery?

Ternary lithium battery can be divided into two types: nickel cobalt aluminum and nickel cobalt manganese according to the different positive electrode materials of the battery. The energy density is mainly determined by the nickel content and manganese content in the battery. The higher the nickel content, the greater the energy density of the battery, but the stability of the battery operation will decrease a lot. The higher the manganese content, the better the stability, but the energy density of the battery cannot be increased, so the densities of the two materials constrain the overall performance of the battery.

Lithium iron phosphate battery?

Lithium iron phosphate battery is a branch of lithium battery. Its advantages are safety, reliability and long service life, but its shortcoming is the energy of lithium iron phosphate battery. The relatively low density is one of the reasons why many electric vehicle manufacturers do not actively use lithium iron phosphate batteries. Therefore, the blade battery developed by BYD this time is also developed to address the pain points of lithium iron phosphate batteries.

How did BYD do it? ?

Today, when battery material science has still not made breakthrough progress, the only way to improve the energy density of batteries is to increase the number of battery packs to improve the endurance performance of electric vehicles. In the same space If more battery packs are inserted, the original battery will have to be made more narrow and elongated, and the single battery will be flatter.

The key to BYD's research and development is to improve the performance of lithium iron phosphate batteries while fully retaining the original safety and reliability characteristics.

I believe you have all seen a video released by BYD. The blade battery can stably pass the four major tests of acupuncture, furnace temperature, extrusion and overcharge under various harsh working environments, allowing The media friends present were stunned. It seems that the safety issues of electric vehicles will soon be completely solved.

It goes without saying that BYD Han uses such high-tech power means to perform well. With the support of two motors at the front and rear, the four-wheel drive high-performance model can accelerate to 100 kilometers in 3.9 seconds. If the acceleration performance is also Part of the credit is due to the motor, but the battery life is entirely the glory of the blade battery. , the NEDC cruising range of the ultra-long-range model is 605km, and the NEDC cruising range of the four-wheel drive high-performance model is 550km, which is a remarkable achievement.

Summary?

BYD has become the mainstay of the domestic electric vehicle industry since it started making batteries, and everyone has witnessed its independent research and development capabilities. It is also due to BYD's leading role that the overall research and development capabilities of our independent electric vehicles continue to narrow the gap with foreign models, and even maintain an advantage in the battery field. It is really not that far away for independent brands to go global.

This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.