What does 811 battery mean?
The 811 battery actually refers to the material of the battery electrode. From the positive electrode material, it mainly uses 80% nickel, 10% cobalt and 10% manganese. To put it simply, based on the previous ternary lithium battery, the electrode material is changed to 8:1:1. This type of battery can guarantee the energy density of the battery to a certain extent and improve the cruising range of the battery. like battery life, security, etc. At present, for 811 batteries, besides CATL, some companies are also carrying out research and development activities. According to relevant information, companies developing 811 batteries include Korean battery manufacturers SK Innovation and LG Chem, which are also planning to launch NCM 811 batteries. They also include cylind battery companiesrics such as BAK and Lishen, who also work on 811 batteries. R&D work, so in terms of products, 811 batteries are not unique to CATL. For high-performance batteries, major battery manufacturers carry out successive research and development.
One million car purchase subsidies
Lifespan of 811 ternary lithium batteries
When it s When it comes to electric vehicles, the first thing that comes to mind is cruising range. The main factor affecting cruising range is the vehicle's battery.
At present, electric vehicles mainly use ternary lithium batteries, which mainly contain three metal materials: nickel, cobalt and manganese. The ratio is different, there are NCM811 batteries.
Generally speaking, the higher the nickel content of the battery, the more active the batteryand the more power it releases. Under the same capacity, the energy density will be greater.
With the same battery capacity, NCM811 batteries offer higher energy density and longer range, which is why many electric vehicle manufacturers use this battery type.
Foreign manufacturers have started large-scale production and application of 811 batteries, and domestic battery companies such as BAK, Li Shen, Guo Xuan, etc. also turned to the R&D and manufacturing of 811 batteries.
Among the purely electric domestic vehicles, the new energy Aions and Geely Geometry A are already equipped with this battery, which has good performance in terms of power and autonomy.
In addition to these transmission electric vehicle companies, some emerging electric vehicle companies also target the 811 engine, such as XpengMotors, Weilai, etc.
The Type 81 engine has obvious advantages, but it also has some disadvantages. As the proportion of manganese in the battery decreases, the electrochemical reaction becomes more intense and the uncertainty increases accordingly.
One million car purchase subsidy
Ningde era charging and discharging time 811 cycles
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strong>The average life of ternary lithium battery pack is 500-1,000 times, and if done well, it can reach more than 1,000 times. Battery life is also directly related to our car usage habits, external ambient temperature, charging habits, etc. The lifespan of the ternary lithium battery can reach 1.2 million kilometers. It has become the first choice of many potential electric vehicle buyers. The lifespan is approximately 3 years.Ternary lithium battery:
Currently, Tesla's excellent battery life is mainly due to its use of a nickel-cobalt-aluminum ternary lithium battery (NCA). The energy density is high, the requirements and costs of the manufacturing process are high, but the structure is unstable and prone to thermal runaway. This is also the main reason why Tesla “accidents” occur frequently.
Domestic electric vehicles mainly use ternary lithium nickel-cobalt-manganese (NCM) batteries. After containing manganese, the battery is more stable. At the same time, the proportion of nickel is reduced and the battery is more stable. safer. The 811 ternary lithium battery is an “optimal solution” among nickel-cobalt-manganese batteries. The structure of the battery, that is, the material of the positive electrode, is nickel-cobalt-manganese.
Ternary lithium battery with a content ratio of 80%:10%:10%. The single energy density can reach 300Wh/kg, which is one of the reasons why the range of domestic cars has generally increased greatly after using 811 ternary lithium batteries. However, Type 811 batteries also have hidden dangers. As the nickel content increases, the stability of the cathode material decreases.
When charging and discharging cyclically and at elevated temperatures, capacity decays at an accelerated rate, battery life decreases, and the risk of spontaneous combustion due to thermal runaway increases. also. Therefore, in the current field of power batteries, it is difficult to achieve a perfect balance between capacity and safety. It's more of a compromise. This is also an important reason why battery manufacturers, notably CATL, LG, Panasonic and other companies are urgently developing new battery technologies.
2000 times.
The 811 battery is a ternary lithium battery, and its number of charge and discharge cycles is only 2,000 times.
The full name of the 811 battery is NCM811 battery. The battery is nickel, cobalt and manganese. The battery is a ternary lithium battery with cathode material of nickel, cobalt and manganese in a ratio of 8:1:1.