Research on thermal management and waste heat utilization of building distributed energy storage battery

The rapid advancement of renewable energy applications has driven a significant increase in the integration of battery energy storage systems within the construction sector. However, the conversion of electrical energy into heat during charging and discharging cycles can adversely affect battery performance. As building-integrated energy storage systems advance, capturing and reusing waste heat are increasingly recognized as valuable strategies for enhancing building energy efficiency. This study developed a novel flexible composite phase change material (ZES@PW) with a high enthalpy of 162.93 J/g. A battery thermal management model was also established to evaluate the potential of waste heat utilization under varying ambient temperatures and assessed the temperature control and waste heat recovery effectiveness. During the heating season, waste heat recovery led to a 19.61 % to 24.88 % reduction in heating water make-up energy consumption. While in the non-heating season, it reduced domestic hot water heating energy consumption by 2.03 % to 2.42 %. The results confirm that the integration of ZES@PW in thermal management systems not only stabilizes battery temperature but also provides significant energy savings for building heating and domestic hot water systems through the efficient reuse of waste heat.