Battery capacity and density per unit volume are steadily increasing, but safety has always been a part of the more concerned. Previously, a large number of models used ternary lithium batteries with high energy density, which can maximize the battery capacity under the premise of not affecting the space in the car too much to improve the cruising range. But the ensuing thermal runaway, battery fire and other events have also sounded the alarm bell for us.
At present, the battery technology led by BYD blade batteries is gradually moving closer to safer lithium iron phosphate batteries, although the density is lacking, but in today's increasingly sophisticated electronic control technology, the mileage has not been seriously attenuated. In addition to BYD, each company has its own three-point technology, although the Great Wall has many new energy models, but has not been able to start its own three-electric technology brand.
Recently, the Great Wall released a battery technology called Dayu, which officially means "Dayu governs water and becomes blockage into thinning.". It can never catch fire and never explode during the normal life cycle of the battery. And claims to raise the power battery safety to a new height in the industry, the most incredible thing is that the Great Wall will dayu battery technology more than 60 patents will be free and open to the whole society, there is a feeling of wanting to dominate the world.
The main features of this system are not the same as the current mainstream battery management, and the current mainstream is fire extinguishing + isolation runaway module. The Great Wall has 8 main concepts of Dayu technology, namely heat source partition, two-way exchange, heat flow distribution, directional detonation, high temperature insulation, automatic fire extinguishing, positive pressure oxygen resistance, and intelligent cooling. Simply put, the heat is evenly distributed in the runaway module, and then the gas and fire flow path is followed by the planned route to the fire extinguishing channel, and then discharged. The pressure in this area is higher than the outside, so that the external oxygen cannot enter, so as to avoid secondary combustion.
At this glance, there is indeed a feeling of big Yu zhi water, which exports the internal heat of the runaway module to the cooling system without affecting other batteries. Such a design idea does not know whether it is effective, or the design idea is right, but in the actual mass production process, whether the material, technology, and accuracy can meet the design standards remains to be verified.
Go Chejun commented: The advantage of the Great Wall technology is to bring new expectations to the market, but this "never" is not used a little sloppily, or the Great Wall is really so confident, we can only wait and see.