期刊
IEEE ACCESS
卷 9, 期 -, 页码 34177-34187出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2021.3057371
关键词
State of charge; Lithium-ion batteries; Transfer learning; Estimation; Convolution; Temperature measurement; Training; Deep learning; lithium-ion batteries; state of charge estimation; temporal convolutional network (TCN); transfer learning
资金
- Inner Mongolia Natural Science Foundation [2018MS06019]
The article introduces a method using Temporal Convolutional Network (TCN) to estimate the SOC of lithium-ion batteries, which can directly map measured values such as voltage, current, and temperature to accurate SOC without using a battery model. The proposed method can accurately estimate SOC under different conditions and achieve an average MAE of 0.67% under various ambient temperature conditions.
Accurate estimation of the state of charge (SOC) is critical for the normal use of lithium-ion battery equipment like electric vehicles. However, the SOC of lithium-ion battery is not available by direct measure, but can only indirectly be estimated by measurable variables. According to the nonlinear characteristics between the measured values and SOC during the working period of lithium-ion batteries, we propose a method to estimate the SOC of lithium-ion batteries with Temporal Convolutional Network (TCN). The measured values of voltage, current, and temperature during the use of lithium-ion batteries can be directly mapped to accurate SOC in this method without using a battery model or adaptive filter. The network can self-learning and update parameters by being fed datasets collected under various working conditions and then obtain a model that can correctly estimate SOC under different estimation conditions. In addition, it can also be applied to different types of lithium-ion batteries through transfer learning with only a small amount of battery data. At various ambient temperature conditions, the average MAE estimated by the proposed method is 0.67% for all the tests, which proves that the TCN network is an effective tool to estimate the SOC of lithium-ion batteries.
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