Identifying a motor: WP30039X

[E-HP]

I bulk charge using big Meanwell PSU’s, in less than 10 minutes. It is really not often that they need balancing. As long as they are never discharged below 3.6v per cell, they keep their balance very long. Most of the lipo bricks that I have used in the last 10 years have been balanced once or twice in their lifespan.

It is not cheaper, not if you buy quality lipo.

Are you bulk charging the entire pack, or by series groups, etc? If you are charging in 10 minutes, is that a full charge or at a high C rate?

I think I'm going to get some better packs, since it looks like two of my 4 packs have two cells each that are going further out of balance each charge cycle (and take forever to balance). The other two packs stay balanced withing a couple of hundredths. I'm going to replace the crappy ones with something better, but the fast charging would be something I'd be willing to pay for too.

 

[Balmorhea]

And it definitely wont be a folder once I'm done with it.

Don't weld it. It’s aluminum and you’ll cut the material strength dramatically if you do.

That’s a passable 15 mph bike, if you pedal hard enough to go 25 mph on a real bike. Juicing it with lots of horsepower is folly and you’ll regret it.

 

[balloway]

Yikes...I thought I was nuts for making a 2wd folder.

 

[MadRhino]

Are you bulk charging the entire pack, or by series groups, etc? If you are charging in 10 minutes, is that a full charge or at a high C rate?

I think I'm going to get some better packs, since it looks like two of my 4 packs have two cells each that are going further out of balance each charge cycle (and take forever to balance). The other two packs stay balanced withing a couple of hundredths. I'm going to replace the crappy ones with something better, but the fast charging would be something I'd be willing to pay for too.

I bulk charge the entire battery to 100v.

If I have some cells that are going off balance, I balance the entire pack, and if they don’t keep balanced, I usually replace the entire pack. The bricks that are still good, are given away or sold cheap to a friend who is consuming low power. This happens when they are starting to get warner and loose capacity. I don’t mix new and old bricks in an pack. Quality lipos usually last me 500 cycles or so and because I ride a lot of mileage, that is not much more than a year

 

[E-HP]

I bulk charge the entire battery to 100v.

If I have some cells that are going off balance, I balance the entire pack, and if they don’t keep balanced, I usually replace the entire pack. The bricks that are still good, are given away or sold cheap to a friend who is consuming low power. This happens when they are starting to get warner and loose capacity. I don’t mix new and old bricks in an pack. Quality lipos usually last me 500 cycles or so and because I ride a lot of mileage, that is not much more than a year

Sounds like I should retire the dud packs, and replace that capacity with something better. If I skip balancing those two, it will take a couple hours to balance them the next time, which doubles the time for charging. I only have about 400 miles on them, so maybe 8 charge cycles, so that sucks.

So for your 10 minute charge, is that a partial charge (packs still have charge on them), or are you charging at 6C ? How much charge current can the higher end cells take?

 

[MadRhino]

Sounds like I should retire the dud packs, and replace that capacity with something better. If I skip balancing those two, it will take a couple hours to balance them the next time, which doubles the time for charging. I only have about 400 miles on them, so maybe 8 charge cycles, so that sucks.

So for your 10 minute charge, is that a partial charge (packs still have charge on them), or are you charging at 6C ? How much charge current can the higher end cells take?

You should claim the guarantee for the bricks that don’t keep balance. 8 cycles is about the test cycling, necessary to sort them before assembly on the bike.

The best RC lipo are rated 15C charge. Mine are 5C but I charge faster, monitoring temp. I never let them cells go lower than 3.6v. Most of the time I charge from 89-90v, that is some 3.7-3.75v.

So I ride from 100v to 90v basically, until they are about 400 cycles. From then I don’t care much, so I start overcharging them to 102-103v. At the end of their useful life, like they are close to 600 cycles, I charge them up to 105v, as long as they are not building heat.

 

[E-HP]

You should claim the guarantee for the bricks that don’t keep balance. 8 cycles is about the test cycling, necessary to sort them before assembly on the bike.

The best RC lipo are rated 15C charge. Mine are 5C but I charge faster, monitoring temp. I never let them cells go lower than 3.6v. Most of the time I charge from 89-90v, that is some 3.7-3.75v.

Thanks, this fills in so many knowledge gaps! Doh, I didn't even pay attention to the charge rating when I bought them, and now see they are also rated for a 5C charge (the charger instructions always say to use 1C ). Time to upgrade my power supply, since I can only get 10 amps at 4S with my current setup.

The the guarantee is a real thing? I thought lipos couldn't be shipped back due to restrictions. I'll look into that; and if I can get the two duds replaced, I'd be pretty happy for a while.

EDIT: Looks like I'm a couple of weeks beyond the 30 day warranty period; something I need to note for next time

 

[MadRhino]

Hobby King usually don’t ask you to ship them back, or when they do it is to the US warehouse. A video is enough to prove a brick defective and yes, quick claims are much more likely to be accepted.

 

[E-HP]

Hobby King usually don’t ask you to ship them back, or when they do it is to the US warehouse. A video is enough to prove a brick defective and yes, quick claims are much more likely to be accepted.

Thanks. I submitted the RMA, and noted that I'm requested partial credit toward one of their graphene packs (a single 10Ah, returning my two 5Ah). I attached pictures, per their instructions. I'm going to get the graphene pack anyway, but receiving some credit would be nice.