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LiPO vs LiHV
question. Do you need to adjust settings on your esc to run LiHV batteries vs. LiPO? If yes does that mean you can’t switch between the 2 batteries with adjusting the ESC setting before running each battery? Thanks. |
Originally Posted by ezimmerman
(Post 15246867)
question. Do you need to adjust settings on your esc to run LiHV batteries vs. LiPO? If yes does that mean you can’t switch between the 2 batteries with adjusting the ESC setting before running each battery? Thanks. |
Originally Posted by gigaplex
(Post 15246902)
No changes required.
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Originally Posted by trigger
(Post 15246909)
X2
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I was running a mamba X in a modified sprint car. When I ran LiPOs it was fine, but I got an LiHV and started having problems. I could not get the esc to calibrate top speed. It kept cutting out around 90% throttle. I ended up smoking 2 motors even though I never get top speed and only ran them maybe 2 to 3 minutes with them cutting out and not really running. So I contacted castle and here’s what they stated. The ESC is calibrated at 4.2v per cell for the cell count (for auto-lipo). With the HV lipos charging to 4.35v/cell the ESC thinks you're running more cells than you are and cutting off early. You'd want to go into Castle Link and set the cutoff voltage for "Custom" and then in the box to the right you'd put in the total cutoff voltage (ie - 6.4v for 2s, 9.6v for 3s, etc). That should resolve it. Let me know if it's still giving you troubles after that. I got a new esc (SMC RF170) so I don’t want to hurt that esc or some more motors. I can’t afford that. |
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Originally Posted by the rc guy
(Post 15247130)
Yes you will need to adjust a esc when running lihv .. most esc are not setup for lihv the smc 170 your going to run with melt down .its not made for a 2 cell lihv.. its a 1s or 2 cell lipo not a lihv 2 cell dont try it.. like castle said to you .use castle link and adjust voltage levels..
just because they sell lihv dont mean any esc will handle them.. I would still not run auto voltage detection, just on the off chance SMC did something similar with their auto detection. I doubt they would though because Castle is a bashing brand where they have to protect people from doing stupid things. In a race car you will not be switching between 2s and 3s, so it is better to pick a set cutoff voltage. I pick 7.0V because it protects batteries in case of a voltage mismatch. |
Can a HV be charged by a regular Lipo charger? I was told by the LHS you could.
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Normal Lipos get charged to 4.2v per cell and HV lipos get charged to 4.35v per cell. So if you have an adjustable setting or a HV mode then it'll be able to do a full charge on a HV battery.
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Originally Posted by performula
(Post 15825370)
Can a HV be charged by a regular Lipo charger? I was told by the LHS you could.
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In racing 4.35V is almost universally not allowed, max. legal voltage is still 4.20V mostly. So for (most) racers, HV cells are just charged to that - with normal LiPo mode.
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Originally Posted by DirkW;[url=tel:15825387
15825387[/url]]In racing 4.35V is almost universally not allowed, max. legal voltage is still 4.20V mostly. So for (most) racers, HV cells are just charged to that - with normal LiPo mode.
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Originally Posted by the rc guy
(Post 15247130)
Yes you will need to adjust a esc when running lihv .. most esc are not setup for lihv the smc 170 your going to run with melt down .its not made for a 2 cell lihv.. its a 1s or 2 cell lipo not a lihv 2 cell dont try it.. like castle said to you .use castle link and adjust voltage levels..
just because they sell lihv dont mean any esc will handle them.. |
Originally Posted by performula
(Post 15825395)
Does this have an impact on HV battery life/health charging to 4.2V?
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Originally Posted by performula
(Post 15825395)
Does this have an impact on HV battery life/health charging to 4.2V?
I've heard that HV cells are supposed to be just selected higher quality LiPo cells, with no real physical difference. Don't know if that is true. |
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