Energy Storage Science and Technology ›› 2023, Vol. 12 ›› Issue (8): 2585-2593.doi: 10.19799/j.cnki.2095-4239.2023.0268

• Energy Storage System and Engineering • Previous Articles     Next Articles

Research on balanced thermal management and energy saving of energy storage system based on planning curve

Ming LI(), Jinyuan XIE, Muchu QIU, Liang SHAO, Qiang HUO   

  1. NR Engineering Co. , Ltd. , Nanjing 211100, Jiangsu, China
  • Received:2023-04-23 Revised:2023-06-03 Online:2023-08-05 Published:2023-08-23
  • Contact: Ming LI E-mail:limin@nrec.com

Abstract:

Considering the increased energy density of the storage battery cabin, the proportion of thermal management energy consumption in the total auxiliary electricity consumption increases gradually. A thermal management control strategy based on an energy management system (EMS) planning curve is proposed in this study to achieve the desired low energy consumption and temperature difference with respect to the energy storage system. Moreover, the battery temperature is used to centrally control the air conditioning in the energy storage battery cabin. The effect of these strategies on cell temperature difference and air-conditioning power consumption was studied based on the experiment on the energy storage battery cabin with a capacity of 5.017 MWh. The results indicate that intrinsic cell inconsistency, module fan state, and air conditioning state all influence cell temperature difference. In the case of existing integration, using air conditioning has a negative effect on the temperature difference. Under the same charge and discharge power, compared with the experiment without control strategies, the cell temperature difference of battery stacks 1 and 2 decreased by 0.9 ℃ and 1.4 ℃, respectively. Benefited from the strategies, the total daily energy consumption of the air conditioning was reduced by 62% as there was no power consumption when on standby.

Key words: energy storage battery cabin, air-condition, temperature control, planning curve, temperature difference, energy conservation

CLC Number: