Why is the ternary lithium battery disabled on commercial vehicles?

The ternary polymer lithium battery refers to a lithium battery using a nickel-cobalt-manganate (Li(NiCoMn)O2) ternary positive electrode material for the positive electrode material, and a ternary composite positive electrode material precursor product, which is a nickel salt, a cobalt salt, a manganese salt. As raw materials, the ratio of nickel-cobalt-manganese can be adjusted according to actual needs. The battery with ternary material as positive electrode is safer than lithium cobalt oxide battery, but the voltage is too low, which is used on mobile phones (the cut-off voltage of mobile phone is generally around 3.0V). ) There will be a noticeable lack of capacity.

The ternary polymer lithium battery is more balanced in terms of capacity and safety, and the cycle performance is better than that of normal lithium cobaltate. In the early stage, the nominal voltage was only 3.5-3.6V due to technical reasons, and there were restrictions on the scope of use, but At present, with the continuous improvement of the formula and the perfect structure, the nominal voltage of the battery has reached 3.7V, and the capacity has reached or exceeded the level of lithium cobalt oxide battery.

The working principle of ternary lithium battery

Lithium battery is a substitute for metal lithium battery that has appeared in the past few years. Its anode uses a carbon electrode capable of absorbing lithium ions. When discharged, lithium turns into lithium ion and leaves the anode of the battery to reach the cathode of the lithium battery. Lithium ions move between the anode and the cathode, and the electrodes themselves do not change. This is the essential difference between a lithium battery and a lithium metal battery. The anode of a lithium battery is a graphite crystal, and the cathode is usually lithium dioxide. At the time of charging, lithium atoms in the cathode are ionized into lithium ions and electrons, and lithium ions move toward the anode to synthesize lithium atoms with electrons. Upon discharge, lithium atoms are ionized from the anode surface of the graphite crystal into lithium ions and electrons, and lithium atoms are synthesized at the cathode. Therefore, in this battery, lithium always appears in the form of lithium ions and does not appear in the form of metallic lithium, so this battery is called a lithium battery.

Ternary lithium battery is disabled on commercial vehicles

At the China Electric Vehicles 100-person meeting, Zhang Xiangmu, director of the Equipment Department of the Ministry of Industry and Information Technology, caused a lot of controversy. He said this: "The Ministry of Industry and Information Technology will organize the risk assessment of the ternary lithium battery. Before the evaluation is completed, the ternary lithium battery bus will be suspended for the list of recommended models for the promotion and application of new energy vehicles."

In response to such news, the Ministry of Information of the Electric Vehicles has issued a special announcement saying that the 100 people will be just a platform, not representing any party. According to the current report, some companies have revealed that the relevant regulatory agencies have suspended the acceptance of the electric bus of the ternary materials, but the authenticity remains to be considered.

The objection to the use of ternary lithium batteries for commercial vehicles is mainly for security reasons. But why the ternary lithium battery will "lie down", from the principle.

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