Text/Peach Lee
We all know that the current market share of new energy vehicles is already very high, and there is a trend of further improvement, but the development of new energy has also faced many tests, the biggest problem is battery technology, which is a key factor restricting the development of new energy vehicles. On the one hand, it is related to the endurance of electric vehicles, on the other hand, it is related to our life safety, how to do a good job in the trade-off is now a problem that all new energy vehicle companies have to face.
The most important thing that car owners care about when buying new energy vehicles is nothing more than endurance performance, charging speed and safety, the most important of which is safety. In response to the problem of battery safety, the major car companies also have their own research programs, many "black technology" technology for the development of new energy vehicles to improve the guarantee, today we will talk about the more mature battery technology, see if there is any you feel very reliable.
Let's talk about BYD's blade battery. The battery packs on the general electric vehicles are assembled into modules by the battery cells, and then the modules are installed into the battery packs, forming a three-stage assembly mode of cell-module-battery pack. Bydir has developed a large battery cell with a length of more than 0.6 meters, which adopts a completely module-free method, and the battery cell is directly integrated into the battery pack, eliminating the intermediate module link, and then lined up together through the array, just like the "blade" inserted into the battery pack, so it is named "blade battery".
BYD has been promoting "safety is the biggest luxury of electric vehicles", so the blade battery is a lithium iron phosphate battery with higher safety, but its biggest drawback is that the volume energy density is too small, and BYD optimizes its physical structure to the greatest extent to solve this shortcoming, and the endurance performance of the blade battery also reaches the mainstream battery life standard, and it also has the advantages of high safety and long life.
Let's take a look at GAC Aean's magazine battery, which we mentioned before, unlike the blade battery, it chooses a ternary lithium battery with higher energy density but slightly worse safety, although the safety is not dominant, but with a strong comprehensive performance, the ternary lithium battery is still a major direction for the development of the future power battery, and the magazine battery is mainly an improvement on the safety of the ternary lithium battery.
The structure adopts the magazine safety compartment design, and its battery module looks like a magazine placed in the battery pack, which is why it is named the magazine battery. It will be in each battery pack in the individual cells are independent of the safety cabin, at the same time, relying on ultra-heat-resistant stable cells, super thermal insulation design, extremely fast cooling system, full-time control of the fifth generation of battery management system with four core technologies, magazine batteries can effectively block the spread of thermal runaway cells.
Let's talk about the Dayu battery of Great Wall Motors. Dayu battery currently only has a ternary lithium version, and the reason why it is named "Dayu" is because the Great Wall uses the concept of "plugging the water of Dayu is not as good as dredging", through the design of the battery pack structure to improve safety, mainly reflected in the heat source partition, two-way exchange, heat flow distribution, directional detonation, automatic fire extinguishing and intelligent cooling These programs for thermal runaway.
Through the eight new design concepts of heat source isolation, two-way commutation, heat flow distribution, directional detonation, high temperature insulation, automatic fire extinguishing, positive voltage oxygen resistance, and intelligent cooling, Dayu battery can realize the "control + conduction = pass" thermal runaway safety matrix, ensuring that the heat inside the cell can be quickly diverted in the case of "large-capacity high-nickel battery cells", "battery pack anywhere", "heating two cells and continuously triggering thermal runaway", so as to achieve no fire, no explosion, and effectively ensure battery safety.
Finally, let's introduce the "amber" and "mica" battery technology of Lantu Automobile. Unlike blade batteries, magazine batteries and other technologies that prevent thermal runaway by changing the internal arrangement of the battery pack, Landu pioneered the "three-dimensional thermal insulation wall" technology in the industry, using thermal flame retardant materials without thermal diffusion in the battery pack to achieve a separate and all-round three-dimensional package for each cell.
Both the "Amber" and "Mica" battery systems use high-quality ternary lithium batteries, the difference is in the material and structure of the three-dimensional insulation wall. The "Amber" battery system 3D thermal barrier technology is filled with a special silicone composite material inside the battery pack, which can form an efficient thermally insulating and flame-retardant insulation layer, so that each cell unit is fully wrapped like "amber". The "mica" battery system three-dimensional thermal shield technology is to add layered Al-Si mica and aerogel to the battery pack, and the battery cell, mica, aerogel will be stacked like mica stone.
Write at the end:
In addition to the battery technology we mentioned above, there are some others, from which we can see that major car companies are paying more and more attention to battery safety when developing new energy vehicles, and I believe that with the increase in sales of new energy vehicles, battery technology will be more and more developed. So who are you most optimistic about these battery technologies?