The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform

Kui Jiao - One of the best experts on this subject based on the ideXlab platform.

  • Numerical investigation of thermal behaviors in lithium-ion Battery stack discharge
    Applied Energy, 2014
    Co-Authors: Jixin Chen, Kui Jiao, Qing Du
    Abstract:

    Thermal management is critically important to maintain the performance and prolong the lifetime of a lithium-ion (Li-ion) Battery. In this paper, a two-dimensional and transient model has been developed for the thermal management of a 20-flat-Plate-Battery stack, followed by comprehensive numerical simulations to study the influences of ambient temperature, Reynolds number, and discharge rate on the temperature distribution in the stack with different cooling materials. The simulation results indicate that liquid cooling is generally more effective in reducing temperature compared to phase-change material, while the latter can lead to more homogeneous temperature distribution. Fast and deep discharge should be avoided, which generally yields high temperature beyond the acceptable range regardless of cooling materials. At low or even subzero ambient temperatures, air cooling is preferred over liquid cooling because heat needs to be retained rather than removed. Such difference becomes small when the ambient temperature increases to a mild level. The effects of Reynolds number are apparent in liquid cooling but negligible in air cooling. Choosing appropriate cooling material and strategy is particularly important in low ambient temperature and fast discharge cases. These findings improve the understanding of Battery stack thermal behaviors and provide the general guidelines for thermal management system. The present model can also be used in developing control system to optimize Battery stack thermal behaviors.

  • Numerical investigation of thermal behaviors in lithium-ion Battery stack discharge
    Applied Energy, 2014
    Co-Authors: Rui Liu, Jingzhi Xun, Kui Jiao, Jixin Chen, Qing Du
    Abstract:

    Thermal management is critically important to maintain the performance and prolong the lifetime of a lithium-ion (Li-ion) Battery. In this paper, a two-dimensional and transient model has been developed for the thermal management of a 20-flat-Plate-Battery stack, followed by comprehensive numerical simulations to study the influences of ambient temperature, Reynolds number, and discharge rate on the temperature distribution in the stack with different cooling materials. The simulation results indicate that liquid cooling is generally more effective in reducing temperature compared to phase-change material, while the latter can lead to more homogeneous temperature distribution. Fast and deep discharge should be avoided, which generally yields high temperature beyond the acceptable range regardless of cooling materials. At low or even subzero ambient temperatures, air cooling is preferred over liquid cooling because heat needs to be retained rather than removed. Such difference becomes small when the ambient temperature increases to a mild level. The effects of Reynolds number are apparent in liquid cooling but negligible in air cooling. Choosing appropriate cooling material and strategy is particularly important in low ambient temperature and fast discharge cases. These findings improve the understanding of Battery stack thermal behaviors and provide the general guidelines for thermal management system. The present model can also be used in developing control system to optimize Battery stack thermal behaviors. © 2014 Elsevier Ltd.

  • Numerical and analytical modeling of lithium ion Battery thermal behaviors with different cooling designs
    Journal of Power Sources, 2013
    Co-Authors: Kui Jiao
    Abstract:

    Abstract Thermal management is critically important to maintain the performance of lithium ion Battery stacks. In this study, a numerical model and an analytical model for the thermal management of lithium ion Battery stacks are developed to investigate the thermal behaviors of flat-Plate and cylindrical stacks during discharging processes. It is found that for the same volume ratio of cooling channel and Battery of flat-Plate design, changing the channel size and the number of channels results in similar average Battery temperatures, however, increasing the channel size improves the cooling energy efficiency but leads to more unevenly distributed temperature, and vice versa. The volume ratio of cooling channel to Battery needs to be higher than 0.014 for flat-Plate design when the Reynolds number of cooling air is around 2000 or higher with a high discharging rate of 2 C. The cylindrical Battery stacks considered in this study are generally less compact and more energy-efficient in cooling than the flat-Plate Battery stacks, and the general thermal behaviors are similar between these two designs. A counter-flow arrangement of the cooling channels or changing the flow direction of the co-flow arrangement periodically may also help the thermal management.

Qing Du - One of the best experts on this subject based on the ideXlab platform.

  • Numerical investigation of thermal behaviors in lithium-ion Battery stack discharge
    Applied Energy, 2014
    Co-Authors: Jixin Chen, Kui Jiao, Qing Du
    Abstract:

    Thermal management is critically important to maintain the performance and prolong the lifetime of a lithium-ion (Li-ion) Battery. In this paper, a two-dimensional and transient model has been developed for the thermal management of a 20-flat-Plate-Battery stack, followed by comprehensive numerical simulations to study the influences of ambient temperature, Reynolds number, and discharge rate on the temperature distribution in the stack with different cooling materials. The simulation results indicate that liquid cooling is generally more effective in reducing temperature compared to phase-change material, while the latter can lead to more homogeneous temperature distribution. Fast and deep discharge should be avoided, which generally yields high temperature beyond the acceptable range regardless of cooling materials. At low or even subzero ambient temperatures, air cooling is preferred over liquid cooling because heat needs to be retained rather than removed. Such difference becomes small when the ambient temperature increases to a mild level. The effects of Reynolds number are apparent in liquid cooling but negligible in air cooling. Choosing appropriate cooling material and strategy is particularly important in low ambient temperature and fast discharge cases. These findings improve the understanding of Battery stack thermal behaviors and provide the general guidelines for thermal management system. The present model can also be used in developing control system to optimize Battery stack thermal behaviors.

  • Numerical investigation of thermal behaviors in lithium-ion Battery stack discharge
    Applied Energy, 2014
    Co-Authors: Rui Liu, Jingzhi Xun, Kui Jiao, Jixin Chen, Qing Du
    Abstract:

    Thermal management is critically important to maintain the performance and prolong the lifetime of a lithium-ion (Li-ion) Battery. In this paper, a two-dimensional and transient model has been developed for the thermal management of a 20-flat-Plate-Battery stack, followed by comprehensive numerical simulations to study the influences of ambient temperature, Reynolds number, and discharge rate on the temperature distribution in the stack with different cooling materials. The simulation results indicate that liquid cooling is generally more effective in reducing temperature compared to phase-change material, while the latter can lead to more homogeneous temperature distribution. Fast and deep discharge should be avoided, which generally yields high temperature beyond the acceptable range regardless of cooling materials. At low or even subzero ambient temperatures, air cooling is preferred over liquid cooling because heat needs to be retained rather than removed. Such difference becomes small when the ambient temperature increases to a mild level. The effects of Reynolds number are apparent in liquid cooling but negligible in air cooling. Choosing appropriate cooling material and strategy is particularly important in low ambient temperature and fast discharge cases. These findings improve the understanding of Battery stack thermal behaviors and provide the general guidelines for thermal management system. The present model can also be used in developing control system to optimize Battery stack thermal behaviors. © 2014 Elsevier Ltd.

Jixin Chen - One of the best experts on this subject based on the ideXlab platform.

  • Numerical investigation of thermal behaviors in lithium-ion Battery stack discharge
    Applied Energy, 2014
    Co-Authors: Jixin Chen, Kui Jiao, Qing Du
    Abstract:

    Thermal management is critically important to maintain the performance and prolong the lifetime of a lithium-ion (Li-ion) Battery. In this paper, a two-dimensional and transient model has been developed for the thermal management of a 20-flat-Plate-Battery stack, followed by comprehensive numerical simulations to study the influences of ambient temperature, Reynolds number, and discharge rate on the temperature distribution in the stack with different cooling materials. The simulation results indicate that liquid cooling is generally more effective in reducing temperature compared to phase-change material, while the latter can lead to more homogeneous temperature distribution. Fast and deep discharge should be avoided, which generally yields high temperature beyond the acceptable range regardless of cooling materials. At low or even subzero ambient temperatures, air cooling is preferred over liquid cooling because heat needs to be retained rather than removed. Such difference becomes small when the ambient temperature increases to a mild level. The effects of Reynolds number are apparent in liquid cooling but negligible in air cooling. Choosing appropriate cooling material and strategy is particularly important in low ambient temperature and fast discharge cases. These findings improve the understanding of Battery stack thermal behaviors and provide the general guidelines for thermal management system. The present model can also be used in developing control system to optimize Battery stack thermal behaviors.

  • Numerical investigation of thermal behaviors in lithium-ion Battery stack discharge
    Applied Energy, 2014
    Co-Authors: Rui Liu, Jingzhi Xun, Kui Jiao, Jixin Chen, Qing Du
    Abstract:

    Thermal management is critically important to maintain the performance and prolong the lifetime of a lithium-ion (Li-ion) Battery. In this paper, a two-dimensional and transient model has been developed for the thermal management of a 20-flat-Plate-Battery stack, followed by comprehensive numerical simulations to study the influences of ambient temperature, Reynolds number, and discharge rate on the temperature distribution in the stack with different cooling materials. The simulation results indicate that liquid cooling is generally more effective in reducing temperature compared to phase-change material, while the latter can lead to more homogeneous temperature distribution. Fast and deep discharge should be avoided, which generally yields high temperature beyond the acceptable range regardless of cooling materials. At low or even subzero ambient temperatures, air cooling is preferred over liquid cooling because heat needs to be retained rather than removed. Such difference becomes small when the ambient temperature increases to a mild level. The effects of Reynolds number are apparent in liquid cooling but negligible in air cooling. Choosing appropriate cooling material and strategy is particularly important in low ambient temperature and fast discharge cases. These findings improve the understanding of Battery stack thermal behaviors and provide the general guidelines for thermal management system. The present model can also be used in developing control system to optimize Battery stack thermal behaviors. © 2014 Elsevier Ltd.

Rui Liu - One of the best experts on this subject based on the ideXlab platform.

  • Numerical investigation of thermal behaviors in lithium-ion Battery stack discharge
    Applied Energy, 2014
    Co-Authors: Rui Liu, Jingzhi Xun, Kui Jiao, Jixin Chen, Qing Du
    Abstract:

    Thermal management is critically important to maintain the performance and prolong the lifetime of a lithium-ion (Li-ion) Battery. In this paper, a two-dimensional and transient model has been developed for the thermal management of a 20-flat-Plate-Battery stack, followed by comprehensive numerical simulations to study the influences of ambient temperature, Reynolds number, and discharge rate on the temperature distribution in the stack with different cooling materials. The simulation results indicate that liquid cooling is generally more effective in reducing temperature compared to phase-change material, while the latter can lead to more homogeneous temperature distribution. Fast and deep discharge should be avoided, which generally yields high temperature beyond the acceptable range regardless of cooling materials. At low or even subzero ambient temperatures, air cooling is preferred over liquid cooling because heat needs to be retained rather than removed. Such difference becomes small when the ambient temperature increases to a mild level. The effects of Reynolds number are apparent in liquid cooling but negligible in air cooling. Choosing appropriate cooling material and strategy is particularly important in low ambient temperature and fast discharge cases. These findings improve the understanding of Battery stack thermal behaviors and provide the general guidelines for thermal management system. The present model can also be used in developing control system to optimize Battery stack thermal behaviors. © 2014 Elsevier Ltd.

Jingzhi Xun - One of the best experts on this subject based on the ideXlab platform.

  • Numerical investigation of thermal behaviors in lithium-ion Battery stack discharge
    Applied Energy, 2014
    Co-Authors: Rui Liu, Jingzhi Xun, Kui Jiao, Jixin Chen, Qing Du
    Abstract:

    Thermal management is critically important to maintain the performance and prolong the lifetime of a lithium-ion (Li-ion) Battery. In this paper, a two-dimensional and transient model has been developed for the thermal management of a 20-flat-Plate-Battery stack, followed by comprehensive numerical simulations to study the influences of ambient temperature, Reynolds number, and discharge rate on the temperature distribution in the stack with different cooling materials. The simulation results indicate that liquid cooling is generally more effective in reducing temperature compared to phase-change material, while the latter can lead to more homogeneous temperature distribution. Fast and deep discharge should be avoided, which generally yields high temperature beyond the acceptable range regardless of cooling materials. At low or even subzero ambient temperatures, air cooling is preferred over liquid cooling because heat needs to be retained rather than removed. Such difference becomes small when the ambient temperature increases to a mild level. The effects of Reynolds number are apparent in liquid cooling but negligible in air cooling. Choosing appropriate cooling material and strategy is particularly important in low ambient temperature and fast discharge cases. These findings improve the understanding of Battery stack thermal behaviors and provide the general guidelines for thermal management system. The present model can also be used in developing control system to optimize Battery stack thermal behaviors. © 2014 Elsevier Ltd.