After the news that CATL tried to abandon the 811 system battery cells and shift its internal focus to "523" as the main development direction came out, current CATL insiders responded to the news and said: That's right. rumor. CATL plans to launch lithium batteries that do not contain nickel, cobalt and manganese, which are internally called "metal-free batteries."
Ternary lithium battery is a lithium battery that uses nickel and cobalt as the cathode material and manganese salt or aluminum salt to stabilize the chemical structure. Previously, the industry has basically reached this consensus: in the evolution to Before solid-state batteries, the nickel-cobalt-manganese NCM route was adopted. By continuously increasing the proportion of nickel, the specific capacity of the ternary cathode material gradually increased to increase the energy density of the battery core, and from the nickel:cobalt:manganese ratio to 3:3: 3. Turn to 6:2:2, and then to 8:1:1. However, as the nickel content increases, the stability of the cathode material decreases. Especially under cyclic charge and discharge and high temperature, the capacity attenuates at an accelerated rate, the battery life decreases, and the risk of spontaneous combustion due to thermal runaway also increases.
The recent spate of spontaneous combustion accidents has also accelerated the spread of rumors that CATL has abandoned the research and development of the 811 ternary lithium battery. Previously, there was news that CATL has basically rejected the "811" route. . The source said: "The incremental use must be less, and the existing stock can only be dealt with in a flexible way, which is very stressful." This has caused speculation among many people in the industry. An insider from CATL responded, "This is a legitimate rumor."
An insider from Ningde responded: "Wouldn't BMW use the 811 for the ix3 this month? The facts are there." BMW will debut a pure electric SUV, the ix3, in Shenyang on September 13, equipped with an 80-degree battery and a cruising range of 520 kilometers.
CATL previously responded that "CATL has not given up on 811 battery cells. Multiple lines in parallel have always been the company's core idea for developing battery cell business. In the short term, 811 battery cells will still be used as the core of CATL." The main offensive strategy of the era." In addition, CATL will launch lithium batteries that do not contain nickel, cobalt and manganese, which are internally called "metal-free batteries."
Nowadays, many car companies have made new attempts and no longer use "811" as the title, including Tesla's iron battery, BYD's blade battery, and SAIC Roewe's tendency to have relatively weak activity. ?532? battery, etc. Among them, Roewe? R? ER6 uses a self-developed large module to have a cruising range of up to ?620km. From the current point of view, the 811 technology route may only be used as a transitional technology. Many companies, including CATL, are also making new research and breakthroughs based on this technology.
This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.