Résultats de recherche pour « Battery storage »

Abstract The Li‐ion battery is an energy storage system in consumer and industrial applications. Because of their cell and pack level protection, Li‐ion battery requires a battery management system (BMS). The important function of the BMS is to monitor and protect the Li‐ion battery cells and packs from fault conditions, in order to maximize their lifecycle and increase safety features. In this research article, an analog BMS is presented for the protection of nickel manganese cobalt oxide‐chemistry‐based single‐cell Li‐ion battery. The Analog BMS is a battery protection circuit module that includes battery protection integrated circuit to protect batteries from overvoltage, undervoltage, overcurrent charging, and overcurrent discharging conditions. In addition, the semiconductor switches are used for charge and discharge protection control. This protection circuit module is designed for 18650 single‐cell Li‐ion battery and test the performance of analog BMS based on protection parameters. A real‐time experiment is carried out on analog BMS interconnected with 18650 single‐cell Li‐ion battery and tested under different charge and discharge rates using standard constant current‐constant voltage (CC‐CV) charging method. The experimental results show that the developed analog BMS protected single‐cell Li‐ion battery from overvoltage, undervoltage, overcurrent charging, and discharging conditions under different C/5, C/2, and 1C rates.

<p>This paper presents the simulated study of 72Ah battery bank, where the possibile causes of faults are analyzed due to varying temp. conditions from 22º Celsius to 59º Celsius (71.6º F to 138.2º F), charging conditions, which can lead to short-circuit, potentially causing electrical shock, fire hazard, personal injury,property damage etc. Each cell is 3.7 V, 6.66 Wh,1800 mA.The system comprises of 400 cells in 40 parallel arrays with 10 cells in each array and four battery management system (BMS) designs were used in the simualtion. The short-circuit study has been divided into two fault categories. First one due to faults inside the design of battery management system (BMS) alone in which nine faults are studied where the simulation was run for 20 hours (72000 seconds) of simulation time for each of the nine fauts, that is 180 hrs or 648000 seconds of simulation time. The second fault cause is attributed due to mixed faults which comprises faults due to batteries in battery bank and due to faulty BMS which resulted in improper charging of the cells. Eleven faults are found in the second case, where again, the simulation was run for 20 hours (72000 seconds) of simulation time for each of the eleven fauts, that is 220 hrs or 792000 seconds. In total, the simulation study is of 1440 000 seconds or 400 hrs or 16.666 days. The data leading to this study and conclusions has also been uploaded. </p>

This paper presents the simulated study of 72Ah battery bank, where the possibile causes of faults are analyzed due to varying temp. conditions from 22º Celsius to 59º Celsius (71.6º F to 138.2º F), charging conditions, which can lead to short-circuit, potentially causing electrical shock, fire hazard, personal injury,property damage etc. Each cell is 3.7 V, 6.66 Wh,1800 mA.The system comprises of 400 cells in 40 parallel arrays with 10 cells in each array and four battery management system (BMS) designs were used in the simualtion. The short-circuit study has been divided into two fault categories. First one due to faults inside the design of battery management system (BMS) alone in which nine faults are studied where the simulation was run for 20 hours (72000 seconds) of simulation time for each of the nine fauts, that is 180 hrs or 648000 seconds of simulation time. The second fault cause is attributed due to mixed faults which comprises faults due to batteries in battery bank and due to faulty BMS which resulted in improper charging of the cells. Eleven faults are found in the second case, where again, the simulation was run for 20 hours (72000 seconds) of simulation time for each of the eleven fauts, that is 220 hrs or 792000 seconds. In total, the simulation study is of 1440 000 seconds or 400 hrs or 16.666 days. The data leading to this study and conclusions has also been uploaded.