Experimental study on thermal performance of a pumped two‐phase battery thermal management system

Zhu, Yuezhao; Fang, Yidong; Fei, Ye

doi:10.1002/er.5247

Cited by 15 publications

(10 citation statements)

References 33 publications

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“…However, when the heat flux is further increased, the phase change inside the cold plate becomes rather intensive, leading to large amount of vapor in the channel. This leads to the thermal performance deterioration under high heat flux 15 …”

Section: Resultsmentioning

confidence: 99%

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Experimental investigation of start‐up and transient thermal performance of pumped two‐phase battery thermal management system

Zhu

Fang

2020

Int J Energy Res

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In this study, a pumped two-phase battery thermal management system was developed, and its start-up and transient thermal performances were experimentally evaluated. The start-up behavior was characterized, and the effects of the flow rate, heat flux, and cold-source temperature on the start-up and transient thermal performances were examined. Three start-up modes were observed: fluctuating growth, temperature overshoot, and smooth growth. The fluctuating growth start-up mode appears to be suitable for battery cooling. The transient performance was improved when the flow rate was decreased, which resulted in a quicker start-up and lower average temperature (t avg) and maximum temperature difference (Δt max). Reducing the flow rate from 0.99 to 0.20 L/min significantly shortened the start-up time, lowered t avg and Δt max , and increased the heat transfer coefficient (α) when the steady state was reached. Increasing the heat flux initially improved and then weakened the transient performance of the pumped two-phase system. Increasing the heat flux from 1.1 to 2.8 W/cm 2 initially reduced the start-up time and t avg to 350 seconds and 1.5 C, respectively, but they then significantly increased to 360 seconds and 13.5 C, respectively. The transient t avg and Δt max decreased with the cold-source temperature (t cs), while the start-up time was independent of changes in t cs .

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Section: Resultsmentioning

confidence: 99%

“…This leads to the thermal performance deterioration under high heat flux. 15 Figure 13 illustrates the transient variation of Δt max at various heat fluxes. Increasing the heat flux first improved and then worsened the transient performance.…”

Section: Effect Of Flow Ratementioning

confidence: 99%

Experimental investigation of start‐up and transient thermal performance of pumped two‐phase battery thermal management system

Zhu

Fang

2020

Int J Energy Res

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“…The author of Ref. [46] showed that systems thermal efficiency is generally improved by increasing refrigerant flow rates. Besides, a pump is often vital for circulating the working fluid at the required mass flow rate [47].…”

Section: References Optimal Temperature Range • C Typementioning

confidence: 99%

Induction Heater Based Battery Thermal Management System for Electric Vehicles

Raza

Park

2020

Energies

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The life and efficiency of electric vehicle batteries are susceptible to temperature. The impact of cold climate dramatically decreases battery life, while at the same time increasing internal impedance. Thus, a battery thermal management system (BTMS) is vital to heat and maintain temperature range if the electric vehicle’s batteries are operating in a cold climate. This paper presents an induction heater-based battery thermal management system that aims to ensure thermal safety and prolong the life cycle of Lithium-ion batteries (Li-Bs). This study used a standard simulation tool known as GT-Suite to simulate the behavior of the proposed BTMS. For the heat transfer, an indirect liquid heating method with variations in flow rate was considered between Lithium-ion batteries. The battery and cabin heating rate was analyzed using the induction heater powers of 2, 4, and 6 kW at ambient temperatures of −20, −10, and 0 ∘C. A water and ethylene glycol mixture with a ratio of 50:50 was considered as an operating fluid. The findings reveal that the thermal performance of the proposed system is generally increased by increasing the flow rate and affected by the induction heater capacity. It is evident that at −20 ∘C with 27 LPM and 6 kW heater capacity, the maximum heat transfer rate is 0.0661 ∘C/s, whereas the lowest is 0.0295 ∘C/s with 2 kW heater capacity. Furthermore, the proposed BTMS could be a practical approach and help to design the thermal system for electric vehicles in the future.

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“…Undoubtedly, the refrigerant cooling method has a representative characteristic of rapid thermal response. However, such kind of research is still at an initial stage 25 . In 2018, Al‐Zareer et al 7,26 immersed the battery into refrigerant R134a liquid pool.…”

Section: Introductionmentioning

confidence: 99%

“…However, such kind of research is still at an initial stage. 25 In 2018, Al-Zareer et al 7,26 immersed the battery into refrigerant R134a liquid pool. If 80% of the battery submerged in the liquid pool, then the maximum temperature of the battery was below 308 K. To improve temperature uniformity, Cen et al 27 began to focus on the temperature difference within the pack improvement from 2018.…”

Section: Introductionmentioning

confidence: 99%

Structural design and its thermal management performance for battery modules based on refrigerant cooling method

2020

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Summary The structural design of a refrigerant plate and its flow property affect the thermal management performance of a battery. This study, aimed at improving the cooling and thermal uniformity based on the R134a cooling method, analyzed the flow resistance of the plate, temperature, and heat‐transfer coefficient of the top board of eight types (type A‐G) by the computational fluid dynamics method. By trade‐off between flow resistance and heat‐transfer efficiency, we determined the optimal type G plate with a modest pressure difference of 1670.6 Pa and the highest heat‐transfer coefficient of 810.8 W/(m2 K). In addition, the relationship between the operating parameters and temperature variation in battery modules and its uniformity has also been analyzed. The results indicate that with this novel cooling method, temperature uniformity of battery modules can be maintained within 5 K at 2C discharging rate. Both increasing inlet R134a flow rate and decreasing evaporative pressure obviously increase the temperature decrease rate of battery modules. With the inlet R134a mass flux ranging from 245 to 490 kg/(m2 s), the evaporative pressure ranging from 412 530 to 291 220 Pa, and the subcooling degree ranging from 0 to 4 K, the battery temperature can be maintained under 300 K. In conclusion, this study develops the guidelines for battery thermal management based on refrigerant cooling, which has a promising application foreground due to its good thermal control performance, flow resistance saving, and lightweight.

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Experimental study on thermal performance of a pumped two‐phase battery thermal management system

Cited by 15 publications

References 33 publications

Experimental investigation of start‐up and transient thermal performance of pumped two‐phase battery thermal management system

Experimental investigation of start‐up and transient thermal performance of pumped two‐phase battery thermal management system

Induction Heater Based Battery Thermal Management System for Electric Vehicles

Structural design and its thermal management performance for battery modules based on refrigerant cooling method

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