Pacific Automotive Network BYD Qin PLUSDMi uses blade batteries. The characteristic of this kind of battery is that through structural innovation, "modules" can be skipped when forming a group, greatly improving the volume utilization rate, and finally achieving the goal of The design goal is to install more batteries in the same space. Compared with traditional battery packs, the volume utilization of the "blade battery" has been increased by more than 50%, which means that the cruising range can be increased by more than 50%, reaching the high energy density of ternary lithium. The same level of batteries
In fact, "Blade Battery" is a name used by BYD to promote a new generation of lithium iron phosphate batteries. In fact, it is the "super lithium iron phosphate battery" that BYD has developed for many years. Perhaps it is the manufacturer. I hope to get a bigger voice through a sharp and relatively concrete name.
The so-called "blade battery" is actually a large battery cell with a length greater than 0.6m developed by BYD, which is arranged in an array and inserted into the battery pack like a "blade". On the one hand, it can improve the space utilization of the power battery pack and increase the energy density; on the other hand, it can ensure that the battery core has a large enough heat dissipation area to conduct internal heat to the outside, thereby matching the higher energy density.
Compared with BYD’s previous lithium iron phosphate batteries, the upgrade of the “Blade Battery” focuses on the fact that the cells can be module-less and directly integrated into battery packs (i.e. CTP technology), thus greatly improving the integration efficiency.
But in fact, BYD is not the first manufacturer to use CPT technology. As the power battery manufacturer with the largest installed capacity in the world (parameters | pictures), CATL used CPT technology before BYD. In September 2019, CATL demonstrated this technology at the Frankfurt Auto Show.
Globally, four companies, Tesla, CATL, BYD, and Honeycomb Energy, have successively started to develop and announce their plans to mass-produce CTP-related products. Module-less power battery packs are becoming the mainstream technology route. .
▲The so-called module of traditional ternary lithium battery pack is to form a module with some related parts, which can also be understood as the concept of a parts assembly. In the field of battery packs, several cells, conductive rows, sampling units and some necessary structural support components are integrated together to form a module, also called a module.
▲ CATL CTP battery pack and CPT (celltopack) integrates the battery cells directly into the battery pack. Since the battery module assembly process is omitted, the number of battery pack components is reduced by 40%, the volume utilization rate of the CTP battery pack is increased by 15-20%, and the production efficiency is increased by 50%, significantly reducing the manufacturing cost of power batteries.
In terms of positive and negative electrode materials, the most widely used automotive power batteries on the market are ternary lithium and lithium iron phosphate, but these two types of power batteries have their own merits.
(Pictures/Text/Photos: Pacific Automotive Network Question and Answer Calling the Beast)