February 16, 20233 yr How is 1 cycle calculated for Lifep04. What factors relate to degrade of cycle count. Is heat a big factor to consider in the calculation of cycle count? What is your take on this topic.
February 16, 20233 yr 54 minutes ago, TaliaB said: How is 1 cycle calculated for Lifep04. What factors relate to degrade of cycle count. Is heat a big factor to consider in the calculation of cycle count? What is your take on this topic.
February 17, 20233 yr @Scorp007 I stand to be corrected but in my case the cycle count is something that after 1 1/2 years of use I'm still trying to figure it out I have a LBSA 5.1 KW/H battery that has the most stupid cycle count, I know the battery is equipped with a Seplos BMS and all the info on the dashboards attached (1 week ) are retrieved from the BMS so one can say they are 100% accurate, only twice in the last 7 days the battery has been bellow 20% yet it counted 10 Cycles.
February 17, 20233 yr It's a bit tricky I think Not all 'cycles' are equal, the curve is non-linear w.r.t. DoD and discharge rate I suspect most manufacturers just use the energy=1 full discharge of battery method because it is the simplest to understand and measure/track e.g. 3000 cycles @ 80% DoD != 6000 cycles @ 40% DoD
February 17, 20233 yr 49 minutes ago, Antonio de Sa said: @Scorp007 I stand to be corrected but in my case the cycle count is something that after 1 1/2 years of use I'm still trying to figure it out I have a LBSA 5.1 KW/H battery that has the most stupid cycle count, I know the battery is equipped with a Seplos BMS and all the info on the dashboards attached (1 week ) are retrieved from the BMS so one can say they are 100% accurate, only twice in the last 7 days the battery has been bellow 20% yet it counted 10 Cycles. Yes we both on the money. What I placed is from Apple. Each BMS have their own criteria. Another example I saw recently is where the total Ah discharged was taken and divided by the battery capacity and from that the cycle count is generated. We have also seen one of our local companies advance 1 cycle the moment the SOC drops below 50%. This to me is not a cycle.
February 17, 20233 yr 4 minutes ago, Scorp007 said: Yes we both on the money. What I placed is from Apple. Each BMS have their own criteria. Another example I saw recently is where the total Ah discharged was taken and divided by the battery capacity and from that the cycle count is generated. We have also seen one of our local companies advance 1 cycle the moment the SOC drops below 50%. This to me is not a cycle. As far as I know is that Seplos cycle count comes with a default value at 20%. So, every time DOD drops below 80% counts one cycle. That can be changed but I don't want to do it because of warranty issues. I know of members that have changed to 90%.
February 17, 20233 yr This is the Dyness one for the 48x, 51x, and Powerbox series Quote This Warranty covers a capacity equivalent to 1 full cycle per day for ten (10) years. Full cycle: Discharge the Nominal capacity of a fully charged battery and fully charge it afterwards. Micro cycles sum up to full cycles according to amount of energy charged and discharged.
February 17, 20233 yr 12 hours ago, TaliaB said: How is 1 cycle calculated for Lifep04. What factors relate to degrade of cycle count. Is heat a big factor to consider in the calculation of cycle count? What is your take on this topic. If a manufacturer rates a battery at 1C it should be able to do however many cycles they guarantee at that 1C rate . This is why you will sometimes see a shorter warranty/less cycles guaranteed than that of a 0,5C battery. Higher C rate discharging/charging means more heat which means less cycle life . Edited February 17, 20233 yr by Nexuss
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