October 20, 20188 yr comment_1957 When will it be possible to create flow batteries in the database. The saltwater flow battery from BlueSky Energy in Austria has been on the market for a while and soon VisBlue in Denmark is also ready with a domestic product. Kind regards, Anders product-datasheet-visblue-redox-flow-battery-system-final.pdf Report
October 22, 20188 yr comment_1959 Hello Anders, good point. We will contact the manufacturer and see if they can provide us with the technological details that we need to simulate these batteries. Thanks for the input! Martin Report
October 30, 20187 yr Author comment_1972 On 10/22/2018 at 10:14 AM, developer_mh said: Hello Anders, good point. We will contact the manufacturer and see if they can provide us with the technological details that we need to simulate these batteries. Thanks for the input! Martin Report
October 30, 20187 yr Author comment_1973 Hello Martin, I have received product data from Blusky Energy, which by the way is a saltwater battery and not a flow battery. The following is the battery data: Cell Voltage = 1,5V No of Cells in serial = 32 Internal resistance = approx. 350mOhm Self-Discharge = 3% DOD @ 80% = 5500 Discharge Table: 10 hours = approx. 53,1Ah (discharge current = ~5A) 5 hours = approx. 46,6Ah (discharge current = ~9,2A) 1 hours and less not possible (to high discharge current, max. = 20A) 1. Is it ok to use the Vented Type for both saltwater and Redox flow batteries? Anders Edited October 31, 20187 yr by Anders Lundberg Learned a bit more about batteries? Report
October 31, 20187 yr comment_1979 Hello Anders, we checked several data sheets from saltwater battery manufacturers to fit our simulation model. Due to the lack of sufficient data we didn't implement a discretely defined model yet. Since saltwater batteries tend to show a similar behaviour as lead-acid batteries (voltage), it is possible to approximate them energetically at least using lead-acid batteries. It is possible to substitute both saltwater and redox-flow batteries using the lead-acid model considering the data you named above. Being able to compare simulation results to measured data is recommended Luckily we have access to measured data of one redox-flow battery in the field, so it seems possible to generate a discrete model in the future. So far I'm disillusioned by the energy efficiency and I strongly recommend to ask the manufacturer for measured data preventing you from overrating redox-flow model substitutes**. If you have further questions feel free to ask! Best regards! Frederik EDIT: **It is possible to regard losses due to hydraulic technics via raising the self-discharge factor. Report
July 23, 20215 yr comment_5798 Hello, I am trying to simulate the redox flow battery "VoltStorage Smart" with the information provided above and by using the product's data sheet. However, the "level of self sufficiency" of 42.1 % seems too low compared to when I choose other battery systems with similar capacities (e.g. BlueSky or BYD with more than 50 %). Does anybody have an explanation? Maybe my model needs to be adapted? Kind regards Hubert EDIT: the efficiency is too high. It should be 0.75 according to the CARMEN online database. Yet, changing it doesn't affect the outcome much. h VOLTSTORAGE.pvprj VoltStorage SMART Technical Datasheet.pdf Report
July 29, 20215 yr comment_5821 Hi Hubert, I answered your email already and hope it reached you. Best regards, Frederik Report
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