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Effect Analysis on Thermal Performance of Lithium-Ion Battery Pack with Wavy Channel Heat Exchanger
Technical Paper
2020-01-5164
ISSN: 0148-7191, e-ISSN: 2688-3627
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Automotive Technical Papers
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English
Abstract
- This paper studies the effects of a unique single-pass wavy channel heat exchanger on the temperature of a battery pack in an electric vehicle, on which there are no studies carried out.
- A detailed numerical study on single-pass wavy channel heat exchanger, with water as a working fluid, for active cooling of the battery pack in an electric vehicle, has been carried out.
- Effect of various parameters like C-rates, flow rates of the coolant, coolant inlet temperatures, and flow arrangements of the coolant on the maximum and minimum temperature of the battery pack.
- The maximum and minimum temperature of the battery pack increases as the C-rate and coolant inlet temperature is increased and the coolant flow rate is decreased.
- Pumping power required to drive the coolant increases as the coolant flow rate is increased and the coolant inlet temperature is decreased.
This work involves the thermal management of 18650 Li-ion battery pack using a unique single-pass wavy channel heat exchanger, where the cells are arranged in a staggered manner. Effects of various parameters, which were not previously considered together, like discharge rate, the flow rate of the coolant, coolant inlet temperature, and different flow arrangements in the channels on the temperature of the battery pack and pressure drop across the wavy channel are analyzed. Also, the dimensions (height × width) of wavy channel is varied from 35 × 3 mm to 45 × 3 mm to check its effects. Results show that at higher C-rate, higher coolant inlet temperature, and lower flow rate of coolant resulted in higher temperatures of the battery pack. Increasing the dimensions of wavy channel resulted in a reduction in temperature by 9.96%, 10.32%, and 10.03% for flow arrangements 1, 2, and 3, respectively, at 4 C-rate, 5 LPM flow rate, and inlet coolant temperature of 45°C. Similarly, pressure drops of 7.9%, 7.74%, and 7.75% were observed for the same conditions. For both wavy channel models, it was found that by changing from flow arrangement 1 to flow arrangement 2, on an average the maximum temperature in the battery pack reduced by 1.49% and by changing from flow arrangement 1 to flow arrangement 3, on an average the maximum temperature in the battery pack reduced by 0.14%. The pressure drop across the channel remained constant regardless of the flow arrangement.
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Citation
Srikanth, P., Heblikar, P., and Ponangi, B., "Effect Analysis on Thermal Performance of Lithium-Ion Battery Pack with Wavy Channel Heat Exchanger," SAE Technical Paper 2020-01-5164, 2021, https://doi.org/10.4271/2020-01-5164.Data Sets - Support Documents
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