Estimation of state of charge (SOC) is of great importance for lithium-ion (Li-ion) batteries used in electric vehicles. This paper presents a state of charge estimation...

A widely used technique for SOC estimation is based on online inference of battery open circuit voltage (OCV). Low-current OCV and Incremental-current OCV tests are two common methods to observe the OCV-SOC relationship, which is an important element of …

2024年10月20日 · LiCoO 2 (LCO) has been the cathode material of choice for three decades for durable, lightweight Li-ion storage systems. Being charged up to 4.2 V versus Li/Li +, LCO provides excellent cycling stability with a specific capacity of ≈140 mAh g −1.

2024年3月1日 · Electrochemical-mechanical performance within composite cathodes is modulated. The validated multiphysics model evalutes the NCM-LCO combination strategy. Mixed NCM and LCO particles demonstrate two-stage electrochemical-mechanical behaviors. The solid electrolyte materials plays a competing role with the modulating of NCM/LCO ratio.

SOC-OCV curves were constructed for each cell chemistry as shown in Figure 6. The lower values of the OCV came from the discharging of the cells, whereas the higher OCV values came from...

近日, 日立麦克赛尔有限公司和先进产业科学技术研究院的Akira Yano等人 研究了表面包覆LiCoO2（LCO）在发生O3/H1-3相变情况下的容量和可逆性。 一种厚度为几纳米的复合氧化物相包覆在LCO表面形成LiMO2结构（M：Co，Al或Zr）。 原位 XRD 和 阻抗分析 表明，循环容量的降低主要是由于电极/电解质界面处锂离子插层电阻增加引起的。 即使在循环测试之后，O3/H1-3相变也是可逆的。 包覆后，O3/H1-3过渡区中的大部分容量能可逆循环100圈。 放电期间，从H1-3 …

The Open Circuit Voltage (OCV) is a fundamental parameter of the cell. The OCV of a battery cell is the potential difference between the positive and negative terminals when no current flows and the cell is at rest. The typical lithium battery OCV curves versus SoC then looks like:

SOC-OCV曲线 是电池在SOC标定过程中非常重要的一条曲线， BMS 运行过程中，一旦满足相关条件，就需要调用该曲线，以矫正SOC值。 因此，该曲线对整个算法的精度尤为重要。 那么哪些因素会影响到该曲线的精度，则是需要深入考虑的问题。 01 电池电压产生原理. 开路电压产生的机理， 锂离子电池 主要是由锂离子脱嵌和插入正负极的晶格来完成电池的充放电的，也就是是所谓的 “摇椅式”机理，而正负极材料插入脱出锂离子时相对于金属锂的电位差值构成了电池的电压 …

2016年11月1日 · A state-of-charge (SOC) versus open-circuit-voltage (OCV) model developed for batteries should preferably be simple, especially for real-time SOC estimation. It should also be capable of representing different types of lithium-ion batteries (LIBs), regardless of temperature change and battery degradation.

2013年7月1日 · We have investigated the evolution of the thermodynamics behaviour and of the crystal structure of electrodes materials of lithium-ion batteries based on graphite anode and lithium cobalt oxide (LCO) cathode after applying high voltage charging between 4.2 V and 4.9 V cut-off voltages (COV).