Study on performance effects for battery energy storage rack in
Once the operating temperature limit is exceeded for a long time, it will lead to battery overheating and uneven temperature distribution, which will not only cause battery
Like other battery-powered applications, BESS experience degradation over time, leading to efficiency loss and reduced performance. Since temperature directly impacts both performance and degradation, improper thermal management can accelerate degradation, further diminishing efficiency and battery lifetime.
Reference points out that the non-uniform distribution of temperature may accelerate the difference in capacity attenuation between parallel battery cells due to inconsistent current between individual battery cells. There is a general belief that the battery pack should not have a temperature difference exceeding 5 °C . Figure 6.
Yu et al. found that the temperature can be reduced by reducing the cell spacing, and different battery module design schemes affect the temperature gradient in the flow direction, but there is inevitably a non-uniformity in the temperature distribution.
In addition to liquid cooling, heat pipes can help make up for the low specific heat capacity of air. Using CHP, Behi et al. proved that the liquid-cooling-coupled heat pipe system outperforms an air-cooling-coupled heat pipe system in terms of cooling effect, and the maximum temperature of the battery is reduced by about 30%.
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