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Lithiums on MK 24V/80/60...NO Speeds Higher than 85% for Prolonged Times?
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<blockquote data-quote="Still Afloat" data-source="post: 508529" data-attributes="member: 32426"><p>LiFePO cells produce 3.2 while lead acid is 2V per cell.</p><p></p><p>A 12V lead acid has six cells: 6 x 2V = 12V</p><p>The closest match with LiFe Po is four cells: 4 x 3.2 = 12.8V</p><p></p><p>So two LiFePO batteries in a series configuration is 25.6V rather than 24V. A 6.6% over voltage (or even 10%) will not affect properly designed electronics.</p><p></p><p>In the real world a freshly 100% charged lead acid battery has a similar voltage as the LiFePO with the resting voltage of the LiFePO being a bit higher. The difference is that lead acid battery voltage gradually drops as the battery is discharged. The LifePO battery holds a fairly constant discharge curve until the usable charge is almost fully depleted.</p><p></p><p>MK probably designed the duty cycle of their motors and speed controllers around lead acid batteries where isn’t possible to run at full voltage for extended periods. They are now concerned about heat build up.</p><p></p><p>It’s good to know that MK is imposing a duty cycle for motors powered by LiFePO batteries but, I would not loose any sleep over this. How often do you troll at 100% for extended periods?</p></blockquote><p></p>
[QUOTE="Still Afloat, post: 508529, member: 32426"] LiFePO cells produce 3.2 while lead acid is 2V per cell. A 12V lead acid has six cells: 6 x 2V = 12V The closest match with LiFe Po is four cells: 4 x 3.2 = 12.8V So two LiFePO batteries in a series configuration is 25.6V rather than 24V. A 6.6% over voltage (or even 10%) will not affect properly designed electronics. In the real world a freshly 100% charged lead acid battery has a similar voltage as the LiFePO with the resting voltage of the LiFePO being a bit higher. The difference is that lead acid battery voltage gradually drops as the battery is discharged. The LifePO battery holds a fairly constant discharge curve until the usable charge is almost fully depleted. MK probably designed the duty cycle of their motors and speed controllers around lead acid batteries where isn’t possible to run at full voltage for extended periods. They are now concerned about heat build up. It’s good to know that MK is imposing a duty cycle for motors powered by LiFePO batteries but, I would not loose any sleep over this. How often do you troll at 100% for extended periods? [/QUOTE]
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Lithiums on MK 24V/80/60...NO Speeds Higher than 85% for Prolonged Times?
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