Table 4 Description of metadata for key values obtained via test procedures 1 and 2 according to UL 1974.
From: Charge and discharge profiles of repurposed LiFePO4 batteries based on the UL 1974 standard
Data | Unit | Description | As per UL 1974 |
|---|---|---|---|
SN | Serial number of the cell | N/A | |
\(OC{V}_{ini}\) | V | Initial OCV | 19.2 Re |
\(Ca{p}_{D}\) | Ah | Discharge ampere hour capacity at \({C}_{R}=0.5{{\rm{h}}}^{-1}\) | 19.4 Re |
\(Ca{p}_{C}\) | Ah | Discharge ampere hour capacity at \({C}_{R}=0.5{{\rm{h}}}^{-1}\) | 19.4 Ex |
\(X\) of \(Ca{p}_{RX}\) | Grouped by measured discharge ampere hour capacity \(Ca{p}_{RX}\) | 19.4 Ex | |
\({R}_{85}\) | \(\Omega \) | DCIR obtained by two-tier DC load method at SOC = 85% | 19.5 Re |
\({V}_{85,1}\) | V | Measured voltage \({V}_{1}\) under the first tier at SOC = 85% | 19.5 Re |
\({I}_{85,1}\) | A | Measured current \({I}_{1}\) under the first tier at SOC = 85% | 19.5 Re |
\({V}_{85,2}\) | V | Measured voltage \({V}_{2}\) under the second tier at SOC = 85% | 19.5 Re |
\({I}_{85,2}\) | A | Measured current \({I}_{2}\) under the second tier at SOC = 85% | 19.5 Re |
\({R}_{20}\) | \(\Omega \) | DCIR obtained by two-tier DC load method at SOC = 20% | 19.5 Re |
\({V}_{20,1}\) | V | Measured voltage \({V}_{1}\) under the first tier at SOC = 20% | 19.5 Re |
\({I}_{20,1}\) | A | Measured current \({I}_{1}\) under the first tier at SOC = 20% | 19.5 Re |
\({V}_{20,2}\) | V | Measured voltage \({V}_{2}\) under the second tier at SOC = 20% | 19.5 Re |
\({I}_{20,2}\) | A | Measured current \({I}_{2}\) under the second tier at SOC = 20% | 19.5 Re |
\(Ca{p}_{C1}\) | Ah | Charge ampere hour capacity at \({C}_{R}=0.5{{\rm{h}}}^{-1}\) | 19.7 Ex |
\(Ca{p}_{DN}\) | Ah | Discharge ampere hour capacity under normal loading conditions (\({C}_{R}=0.5{{\rm{h}}}^{-1}\)) | 19.7 Re |
\(Ca{p}_{C2}\) | Ah | Charge ampere hour capacity at \({C}_{R}=0.5{{\rm{h}}}^{-1}\) | 19.7 Ex |
\(Ca{p}_{DM}\) | Ah | Discharge ampere hour capacity under maximum loading conditions (\({C}_{R}=1{{\rm{h}}}^{-1}\)) | 19.7 Re |
\(Ca{p}_{C3}\) | Ah | Charge ampere hour capacity at \({C}_{R}=0.5{{\rm{h}}}^{-1}\) | 19.7 Ex |
\(OC{V}_{5m}\) | V | Measured OCV at 5 minutes after full charge | 19.8 Re |
\(OC{V}_{1h}\) | V | Measured OCV at 1 hour after full charge | 19.8 Re |
\(OC{V}_{24h}\) | V | Measured OCV at 24 hours after full charge | 19.8 Re |
