The blade battery introduced by BYD is actually a kind of lithium iron phosphate battery, but it is just a flat design of the battery core. According to BYD's patent, the longest blade battery can reach 2500mm, which is more than 10 times that of the traditional lithium iron phosphate battery. In this way, the recombination efficiency of the battery cells can be greatly improved, which means that the energy density of the battery pack can be improved. According to the data found in China National Intellectual Property Administration, BYD's patent of "blade battery" can increase the specific energy density of ordinary battery pack from 25 1Wh/L to 332Wh/L, and the production cost is also reduced due to simpler manufacturing process.
As for Tesla's choice to use cobalt-free batteries, it is more because of reducing production costs. Cobalt-free battery does not contain cobalt, so the production cost of the battery is reduced, and for the whole vehicle, the cost and price can be reduced, thus improving the market competitiveness. However, although relevant people applauded the lithium iron phosphate battery after Tesla proposed cobalt-free, on February 2 1 day, Tesla's official Tik Tok account said: "Cobalt-free does not mean that it must be lithium ferrous phosphate."
In addition, we also need to know that BYD's blade battery has improved the energy density and reduced the production cost, but strictly speaking, it is only the structural change of ordinary lithium iron phosphate battery and does not involve material innovation. Therefore, it can really impact the market share of ternary lithium batteries in the short term, but the situation that liquid lithium-ion batteries are obviously affected by temperature still exists. Therefore, the development of the battery industry still needs to be continuously promoted.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.