The invention provides a lithium ion battery and a preparation method thereof, a LiFe < 1-a > MnaPO4 material and a ternary material are mixed to serve as a positive electrode active material of a positive electrode plate, and the positive electrode active material in a first positive electrode coating close to a positive electrode current collector is controlled to comprise the LiFe < 1-a > MnaPO4 material, the positive electrode active material in the second positive electrode coating far away from the positive electrode current collector comprises a ternary material, and the defined parameter Y is in the range of-7 to 4.5 and the parameter Z is in the range of 0 to 6 by controlling the proportion of the two materials in each layer. Therefore, the battery can be ensured to have relatively high energy density and excellent safety performance. The invention further provides a power vehicle.
本申请提供了一种锂离子电池及其制备方法,将LiFe1‑aMnaPO4材料和三元材料混合作正极极片的正极活性材料,且控制靠近正极集流体的第一正极涂层中的正极活性材料包括LiFe1‑aMnaPO4材料,远离正极集流体的第二正极涂层中的正极活性材料包括三元材料,并通过这两种材料在各分层中的比例控制,使得所定义参数Y在‑7至4.5的范围、参数Z在0‑6的范围内。这样可保证该电池能兼顾较高的能量密度以及优异的安全性能。本申请还提供了一种动力车辆。
Lithium ion battery, preparation method thereof and power vehicle
一种锂离子电池及其制备方法及动力车辆
2023-06-23
Patent
Electronic Resource
Chinese
IPC: | H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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