A critical review of battery thermal performance and liquid based battery thermal management

United States. Dept. of Energy. Office of Basic Energy Sciences (Solid-State Solar-Thermal Energy Conversion Center)

Condensation heat transfer on superhydrophobic surfaces

A review of safety strategies of a Li-ion battery

https://www.zenodo.org/record/2642457/files/A%20review%20on%20various%20temperature-indication%20methods%20for%20Li-ion%20batteries.pdf

A review on various temperature-indication methods for Li-ion batteries

Effects of different phase change material thermal management strategies on the cooling performance of the power lithium ion batteries: A review

Lithium-ion power battery has become one of the main power sources for electric vehicles and hybrid electric vehicles because of superior performance compared with other power sources. In order to ensure the safety and improve the performance, the maximum operating temperature and local temperature difference of batteries must be maintained in an appropriate range. The effect of temperature on the capacity fade and aging are simply investigated. The electrode structure, including electrode thickness, particle size and porosity, are analyzed. It is found that all of them have significant influences on the heat generation of battery. Details of various thermal management technologies, namely air based, phase change material based, heat pipe based and liquid based, are discussed and compared from the perspective of improving the external heat dissipation. The selection of different battery thermal management (BTM) technologies should be based on the cooling demand and applications, and liquid cooling is suggested being the most suitable method for large-scale battery pack charged/discharged at higher C-rate and in high-temperature environment. The thermal safety in the respect of propagation and suppression of thermal runaway is analyzed.

A review on lithium-ion power battery thermal management technologies and thermal safety

Investigation on lithium-ion battery electrochemical and thermal characteristic based on electrochemical-thermal coupled model

Investigation on thermal design of a rack with the pulsating heat pipe for cooling CPUs

Coalescence-induced droplet jumping has the potential to enhance the performance of a variety of applications including condensation heat transfer, surface self-cleaning, anti-icing, and defrosting to name a few. Here, we study droplet jumping on hierarchical microgrooved and nanostructured smooth superhydrophobic surfaces. We show that the confined microgroove structures play a key role in tailoring droplet coalescence hydrodynamics, which in turn affects the droplet jumping velocity and energy conversion efficiency. We observed self-jumping of individual deformed droplets within microgrooves having maximum surface-to-kinetic energy conversion efficiency of 8%. Furthermore, various coalescence-induced jumping modes were observed on the hierarchical microgrooved superhydrophobic surface. The microgroove structure enabled high droplet jumping velocity (≈0.74U) and energy conversion efficiency (≈46%) by enabling the coalescence of deformed droplets in microgrooves with undeformed droplets on adjacent plateaus. The jumping velocity and energy conversion efficiency enhancements are 1.93× and 6.67× higher than traditional coalescence-induced droplet jumping on smooth superhydrophobic surfaces. This work not only demonstrates high droplet jumping velocity and energy conversion efficiency but also demonstrates the key role played by macroscale structures on coalescence hydrodynamics and elucidates a method to further control droplet jumping physics for a plethora of applications.

Breaking Droplet Jumping Energy Conversion Limits with Superhydrophobic Microgrooves

Condensation is of great interest in various heat exchange processes, owing to the elevated heat and mass transfer by phase change. In this work, a hierarchically microgrooved superhydrophobic surface was fabricated by the mechanical broaching and chemical etching methods to enhance the condensation heat transfer. The dynamic behaviors of condensed droplets and condensation heat transfer characteristics were analyzed on such surface. Particularly, there were two droplet jumping modes, the conventional coalescence jumping of small droplets (<100 μm) at small subcooling (ΔT < 5 K) and the forced jumping of large stretched droplets (400–500 μm) in microgrooves at a broad range of subcooling (ΔT < 12 K), simultaneously emerging on the hierarchically microgrooved superhydrophobic surface. The interesting coalescence-induced sweeping behavior independent of gravity is observed at large surface subcooling. The coalescence-induced jumping and sweeping significantly facilitated the renewal of surface. The investigation has showed that a 90% higher heat flux at small subcooling (ΔT < 5 K) and a 66% higher heat flux at large subcooling (5 K < ΔT < 24 K) were reached on the hierarchically microgrooved superhydrophobic surface compared with the plain hydrophobic surface.

Chao Dang

Papers

A review on lithium-ion power battery thermal management technologies and thermal safety

Investigation on lithium-ion battery electrochemical and thermal characteristic based on electrochemical-thermal coupled model

Investigation on thermal design of a rack with the pulsating heat pipe for cooling CPUs

Breaking Droplet Jumping Energy Conversion Limits with Superhydrophobic Microgrooves

Forced jumping and coalescence-induced sweeping enhanced the dropwise condensation on hierarchically microgrooved superhydrophobic surface