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Two months ago, BYD's new car Han finally went public in everyone's expectation. Three of the four Korean versions are pure electric vehicles, which once again shows BYD's emphasis on the field of electric vehicles.

Also listed with Han is BYD's latest masterpiece in the battery field-blade battery. In the publicity, BYD played the slogan of "safer, more reliable and longer life". I don't know if the blade battery is real or fake.

What is a blade battery? ?

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

Ternary lithium battery?

Ternary lithium batteries can be divided into nickel cobalt aluminum and nickel cobalt manganese according to different cathode materials. 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 working stability of the battery will decrease a lot. The higher the manganese content, the better the stability, but the energy density of the battery will not come up, so the density of these two materials restricts the performance of the whole battery.

Ferrous lithium phosphate?

Lithium iron phosphate battery is a branch of lithium battery. Its advantages are safety, reliability and long service life. However, the fly in the ointment is that the energy density of lithium iron phosphate battery is relatively low, which is one of the reasons why many electric vehicle manufacturers have not actively adopted lithium iron phosphate battery. Therefore, the blade battery developed by BYD this time is also aimed at the pain point of lithium iron phosphate battery.

How did BYD do it? ? ?

Up to now, the science of battery materials has not made a breakthrough. In order to improve the energy density of batteries, the endurance performance of electric vehicles can only be improved by increasing the number of battery packs. If more batteries are installed in the same space, the original batteries will be made longer and narrower, and the single batteries will be flatter.

The key point of BYD's research and development is to improve the performance of lithium iron phosphate battery, and at the same time, it is necessary to completely maintain the original safety and reliability characteristics.

I believe everyone has seen a video released by BYD. In various harsh working environments, the blade battery can still pass the four tests of acupuncture, oven temperature, extrusion and overcharge stably, which makes the media friends present dumbfounded. It seems that the safety problem of electric vehicles will be completely solved soon.

Needless to say, BYD Korea has the performance of such high-tech power means. With the blessing of the front and rear motors, the acceleration time of 100 kilometers is 3.9 seconds. If the acceleration performance is partly attributed to the motor, the endurance performance is entirely the glory of the blade battery. The cruising range of NEDC, a super-long cruising model, is 605km, and NEDC, a four-wheel drive high-performance model, is 550km, with remarkable achievements.

Summary?

BYD has been the mainstay of the domestic electric vehicle industry since it made batteries, and its independent research and development capabilities are obvious to all. It is also the protagonist of BYD. The gap between the overall R&D capability of our independent electric vehicles and foreign models is constantly narrowing, and even we have always maintained an advantage in the field of batteries. It's really not so far away for our own brand to go global.

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