A Deterioration Diagnosis Circuit of a Lithium-Ion Battery Using Microcomputer Implementing Z-Transform Convolution
The deterioration of lithium-ion batteries has been detected by an increase in the battery impedance by means of an alternating current method or a battery capacity test. These methods require an interruption of the operation because the battery has to be removed. A method estimating equivalent circ...
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MDPI AG
2021
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oai:doaj.org-article:a1d3b79096a449499a8c9861a5b92e262021-11-11T15:43:22ZA Deterioration Diagnosis Circuit of a Lithium-Ion Battery Using Microcomputer Implementing Z-Transform Convolution10.3390/en142168681996-1073https://doaj.org/article/a1d3b79096a449499a8c9861a5b92e262021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/6868https://doaj.org/toc/1996-1073The deterioration of lithium-ion batteries has been detected by an increase in the battery impedance by means of an alternating current method or a battery capacity test. These methods require an interruption of the operation because the battery has to be removed. A method estimating equivalent circuit parameters of a lithium-ion battery during operation is proposed in this article. The increase in the internal impedance has a close relation to the deterioration of the battery. The circuit is expressed by a resister and an <i>RC</i> parallel circuit connected in series. The parameters can be estimated by applying a convolution technique to the voltage and current fluctuation of the battery during operation. A diagnosis circuit using a microcomputer is developed using a simple algorithm employing <i>z</i>-transformation in the parameter estimation. The estimated parameters depend on its state of charge (SOC) and ambient temperature. The SOC dependency is solved by estimating timing, and the temperature dependency is corrected by a function derived in this article. The deterioration diagnosis of the battery can be applied to a solar power generation system, and the feasibility is discussed in this article.Naoyuki YoshiokaNaoto NagaokaMDPI AGarticlelithium-ion batteryequivalent circuit parametersconvolution<i>z</i>-transformationstate of charge (SOC)deterioration diagnosisTechnologyTENEnergies, Vol 14, Iss 6868, p 6868 (2021) |
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DOAJ |
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| topic |
lithium-ion battery equivalent circuit parameters convolution <i>z</i>-transformation state of charge (SOC) deterioration diagnosis Technology T |
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lithium-ion battery equivalent circuit parameters convolution <i>z</i>-transformation state of charge (SOC) deterioration diagnosis Technology T Naoyuki Yoshioka Naoto Nagaoka A Deterioration Diagnosis Circuit of a Lithium-Ion Battery Using Microcomputer Implementing Z-Transform Convolution |
| description |
The deterioration of lithium-ion batteries has been detected by an increase in the battery impedance by means of an alternating current method or a battery capacity test. These methods require an interruption of the operation because the battery has to be removed. A method estimating equivalent circuit parameters of a lithium-ion battery during operation is proposed in this article. The increase in the internal impedance has a close relation to the deterioration of the battery. The circuit is expressed by a resister and an <i>RC</i> parallel circuit connected in series. The parameters can be estimated by applying a convolution technique to the voltage and current fluctuation of the battery during operation. A diagnosis circuit using a microcomputer is developed using a simple algorithm employing <i>z</i>-transformation in the parameter estimation. The estimated parameters depend on its state of charge (SOC) and ambient temperature. The SOC dependency is solved by estimating timing, and the temperature dependency is corrected by a function derived in this article. The deterioration diagnosis of the battery can be applied to a solar power generation system, and the feasibility is discussed in this article. |
| format |
article |
| author |
Naoyuki Yoshioka Naoto Nagaoka |
| author_facet |
Naoyuki Yoshioka Naoto Nagaoka |
| author_sort |
Naoyuki Yoshioka |
| title |
A Deterioration Diagnosis Circuit of a Lithium-Ion Battery Using Microcomputer Implementing Z-Transform Convolution |
| title_short |
A Deterioration Diagnosis Circuit of a Lithium-Ion Battery Using Microcomputer Implementing Z-Transform Convolution |
| title_full |
A Deterioration Diagnosis Circuit of a Lithium-Ion Battery Using Microcomputer Implementing Z-Transform Convolution |
| title_fullStr |
A Deterioration Diagnosis Circuit of a Lithium-Ion Battery Using Microcomputer Implementing Z-Transform Convolution |
| title_full_unstemmed |
A Deterioration Diagnosis Circuit of a Lithium-Ion Battery Using Microcomputer Implementing Z-Transform Convolution |
| title_sort |
deterioration diagnosis circuit of a lithium-ion battery using microcomputer implementing z-transform convolution |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/a1d3b79096a449499a8c9861a5b92e26 |
| work_keys_str_mv |
AT naoyukiyoshioka adeteriorationdiagnosiscircuitofalithiumionbatteryusingmicrocomputerimplementingztransformconvolution AT naotonagaoka adeteriorationdiagnosiscircuitofalithiumionbatteryusingmicrocomputerimplementingztransformconvolution AT naoyukiyoshioka deteriorationdiagnosiscircuitofalithiumionbatteryusingmicrocomputerimplementingztransformconvolution AT naotonagaoka deteriorationdiagnosiscircuitofalithiumionbatteryusingmicrocomputerimplementingztransformconvolution |
| _version_ |
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