A Coupled Nonlinear Viscoelastic–Viscoplastic Thermomechanical Model for Polymeric Lithium-Ion Battery Separators
One of the major concerns in ensuring lithium-ion battery (LIB) safety in abuse scenarios is the structural integrity of the battery separator. This paper presents a coupled viscoelastic–viscoplastic model for predicting the thermomechanical response of polymeric battery separators in abuse scenario...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Batteries |
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| Online Access: | https://www.mdpi.com/2313-0105/9/9/475 |
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| author | Royal Chibuzor Ihuaenyi Jie Deng Chulheung Bae Xinran Xiao |
| author_facet | Royal Chibuzor Ihuaenyi Jie Deng Chulheung Bae Xinran Xiao |
| author_sort | Royal Chibuzor Ihuaenyi |
| collection | DOAJ |
| description | One of the major concerns in ensuring lithium-ion battery (LIB) safety in abuse scenarios is the structural integrity of the battery separator. This paper presents a coupled viscoelastic–viscoplastic model for predicting the thermomechanical response of polymeric battery separators in abuse scenarios under combined mechanical and thermal loadings. The viscoplastic model is developed based on a rheological framework that considers the mechanisms involved in the initial yielding, change in viscosity, strain softening and strain hardening of polymeric separators. The viscoplastic model is then coupled with a previously developed orthotropic nonlinear thermoviscoelastic model to predict the thermomechanical response of polymeric separators before the onset of failure. The model parameters are determined for Celgard<sup>®</sup>2400, a polypropylene (PP) separator, and the model is implemented in the LS-DYNA<sup>®</sup> finite element (FE) package as a user-defined subroutine. Punch test simulations are employed to verify the model predictions under biaxial stress states. Simulations of uniaxial tensile stress–strain responses at different strain rates and temperatures are compared with experimental data to validate the model predictions. The model predictions of the material anisotropy, rate and temperature dependence agree well with experimental observations. |
| first_indexed | 2024-03-10T23:02:45Z |
| format | Article |
| id | doaj.art-942b84ed012b4df48d8338a54861eb5d |
| institution | Directory Open Access Journal |
| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-03-10T23:02:45Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj.art-942b84ed012b4df48d8338a54861eb5d2023-11-19T09:33:56ZengMDPI AGBatteries2313-01052023-09-019947510.3390/batteries9090475A Coupled Nonlinear Viscoelastic–Viscoplastic Thermomechanical Model for Polymeric Lithium-Ion Battery SeparatorsRoyal Chibuzor Ihuaenyi0Jie Deng1Chulheung Bae2Xinran Xiao3Department of Mechanical Engineering, Michigan State University, Lansing, MI 48910, USADepartment of Electrification Subsystems and Power Supply, Ford Motor Company, Dearborn, MI 48124, USADepartment of Electrification Subsystems and Power Supply, Ford Motor Company, Dearborn, MI 48124, USADepartment of Mechanical Engineering, Michigan State University, Lansing, MI 48910, USAOne of the major concerns in ensuring lithium-ion battery (LIB) safety in abuse scenarios is the structural integrity of the battery separator. This paper presents a coupled viscoelastic–viscoplastic model for predicting the thermomechanical response of polymeric battery separators in abuse scenarios under combined mechanical and thermal loadings. The viscoplastic model is developed based on a rheological framework that considers the mechanisms involved in the initial yielding, change in viscosity, strain softening and strain hardening of polymeric separators. The viscoplastic model is then coupled with a previously developed orthotropic nonlinear thermoviscoelastic model to predict the thermomechanical response of polymeric separators before the onset of failure. The model parameters are determined for Celgard<sup>®</sup>2400, a polypropylene (PP) separator, and the model is implemented in the LS-DYNA<sup>®</sup> finite element (FE) package as a user-defined subroutine. Punch test simulations are employed to verify the model predictions under biaxial stress states. Simulations of uniaxial tensile stress–strain responses at different strain rates and temperatures are compared with experimental data to validate the model predictions. The model predictions of the material anisotropy, rate and temperature dependence agree well with experimental observations.https://www.mdpi.com/2313-0105/9/9/475lithium-ion batteriesbattery separatorviscoelasticityviscoplasticityconstitutive modelingsimulation |
| spellingShingle | Royal Chibuzor Ihuaenyi Jie Deng Chulheung Bae Xinran Xiao A Coupled Nonlinear Viscoelastic–Viscoplastic Thermomechanical Model for Polymeric Lithium-Ion Battery Separators Batteries lithium-ion batteries battery separator viscoelasticity viscoplasticity constitutive modeling simulation |
| title | A Coupled Nonlinear Viscoelastic–Viscoplastic Thermomechanical Model for Polymeric Lithium-Ion Battery Separators |
| title_full | A Coupled Nonlinear Viscoelastic–Viscoplastic Thermomechanical Model for Polymeric Lithium-Ion Battery Separators |
| title_fullStr | A Coupled Nonlinear Viscoelastic–Viscoplastic Thermomechanical Model for Polymeric Lithium-Ion Battery Separators |
| title_full_unstemmed | A Coupled Nonlinear Viscoelastic–Viscoplastic Thermomechanical Model for Polymeric Lithium-Ion Battery Separators |
| title_short | A Coupled Nonlinear Viscoelastic–Viscoplastic Thermomechanical Model for Polymeric Lithium-Ion Battery Separators |
| title_sort | coupled nonlinear viscoelastic viscoplastic thermomechanical model for polymeric lithium ion battery separators |
| topic | lithium-ion batteries battery separator viscoelasticity viscoplasticity constitutive modeling simulation |
| url | https://www.mdpi.com/2313-0105/9/9/475 |
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