The electrical energy generation is one of the main pollution causes as it is still largely based on oil and coal generators. Renewable energy sources are the most mature alternative but their production is intermittent and then require energy storage systems able to store a high quantity of energy to increase their usability. The second-life batteries of electric vehicles and low-cost battery chemistries are the best candidates to compose low-cost energy storage systems for these applications. These batteries must be parallel-connected to obtain the required capacity. A novel parallelization approach based on Input Parallel/Output Serial DC/DC Partial Power converter series-connected to each battery is presented in this paper. This approach is applied to different case studies showing that controlling only the 15% of the battery power allows the DC/DC converter to control the sharing of the grid current among the batteries. The reduction of the controlled power leads to a reduction of the cost of the energy storage system.
Novel Battery Parallelization Approach Using DC/DC Partial Power Converter in Micro-Grids
Simonte G.;Di Rienzo R.;Nicodemo N.;Verani A.;Baronti Federico;Roncella R.;Saletti R.
2024-01-01
Abstract
The electrical energy generation is one of the main pollution causes as it is still largely based on oil and coal generators. Renewable energy sources are the most mature alternative but their production is intermittent and then require energy storage systems able to store a high quantity of energy to increase their usability. The second-life batteries of electric vehicles and low-cost battery chemistries are the best candidates to compose low-cost energy storage systems for these applications. These batteries must be parallel-connected to obtain the required capacity. A novel parallelization approach based on Input Parallel/Output Serial DC/DC Partial Power converter series-connected to each battery is presented in this paper. This approach is applied to different case studies showing that controlling only the 15% of the battery power allows the DC/DC converter to control the sharing of the grid current among the batteries. The reduction of the controlled power leads to a reduction of the cost of the energy storage system.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
