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首页> 外文期刊>Industrial Electronics, IEEE Transactions on >A Closed-Loop Constant-Temperature Constant-Voltage Charging Technique to Reduce Charge Time of Lithium-Ion Batteries
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A Closed-Loop Constant-Temperature Constant-Voltage Charging Technique to Reduce Charge Time of Lithium-Ion Batteries

机译：闭环恒温恒压充电技术，减少锂离子电池的充电时间

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摘要

Existing charging techniques for lithium-ion batteries use a largely open-loop approach, where the charge profile is predecided based on a priori knowledge of cell parameters. There is a need for closed-loop charging techniques that use instantaneous cell voltage and/or temperature to modulate the charging current magnitude. This paper addresses this gap by proposing a constant-temperature constant-voltage (CT-CV) charging technique, considering cell temperature as a key degradation metric. The proposed CT-CV charging scheme employs a simple and easy-to-implement proportional-integral-derivative (PID) controller aided by a feed-forward term. The charging current is dynamically adjusted in response to the battery temperature, which indirectly reflects its aging and thermal environment. As per experimental results, the proposed method achieves 20% faster charging with the same total temperature rise as constant-current constant-voltage (CC-CV) technique. Alternatively, it causes 20% lower cell temperature rise for given total charge time. It can easily accommodate applications that demand even faster charging by simply raising the set temperature. This paper establishes the benefits of the proposed CT-CV charging at cell level and raises the possibility of extending it to the pack level by integrating it with battery management systems.
机译：锂离子电池的现有充电技术使用很大程度上是开环的方法，其中，基于电池参数的先验知识来确定充电曲线。需要使用瞬时电池电压和/或温度来调节充电电流幅度的闭环充电技术。本文通过提出一种恒温恒压（CT-CV）充电技术来解决这一差距，并将电池温度视为关键的降级指标。所提出的CT-CV充电方案采用了一个简单且易于实现的比例积分微分（PID）控制器，并带有前馈项。充电电流可根据电池温度动态调整，这间接反映了电池的老化和热环境。根据实验结果，与恒流恒压（CC-CV）技术相同，该方法在总温升相同的情况下，充电速度提高了20％。或者，对于给定的总充电时间，它会使电池温度降低20％。通过简单地提高设定温度，它可以轻松适应要求更快充电的应用。本文建立了建议的CT-CV充电在电池级的好处，并提出了通过将其与电池管理系统集成而将其扩展到电池组级别的可能性。

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