New Builder Parts Check and LCD question

ESK8 Electronics
8

Do you have a bms, battery pack and switch wiring diagram?

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9

Here’s a 10s diagram

http://www.batterysupports.com/36v-37v-42v-10s-80a-10x-36v-lithium-ion-lipolymer-battery-bms-p-389.html

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It doesn’t show

image.png750×1334 197 KB

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Curious, what is a BMS? Also thanks @longhairedboy for the Batt monitor info!

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Link fixed

@dstnceswmer They do a bunch of different things such as overcurrent, overdischarge, etc protection. Main purpose is to balance charge the batteries though.

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@dstnceswmer Looks like you have a couple of issues with this line up. Your battery looks like it could be a 6s2p or a 12s1p, Both choices would be out of optimal efficiency when used with that sweet 192kv motor. You would be much better off with a 10s battery. If you are going with Lipos, then two 5s packs would be perfect. Your esc is top end rated@6s, so you might want to consider the choices available. Best to give yourself some wiggle room. Check out this thread about the matter:

Also check out Ollinboardco!! Simply the best parts… http://www.ollinboardcompany.com/product/om5065-200kv

Hope that is helpful! :grin:

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So is that not something that is necessary if you are using a balance charger such as the one I listed at the beginning of this thread?

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It’s not necessary, just make sure you use a fuse and monitor your voltages carefully.

16

@Ulfberht Thanks for the info! I was planning on a 6s2p setup. I figured that would give a max current of (20C*5000mAh/1000)=100A with 22.2V well within the max tolerances of the ESC and motor. Are you saying it is out optimal efficiency since my voltage is lower? would it still be as strong as if I just had a motor rated closer to 6s? I was under the impression that as long as the motor rating was greater than the battery that you were good to go.

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I’m not saying that it won’t “work”, but it will work much more optimally with a higher voltage. Also the higher the voltage, the less juice the motors will need to pull to do the same work. Also less heat will be produced. @22.2-24v that motor will get pretty hungry for juice and heat up pretty good. Unless you are a very lightweight person, I would suggest rethinking 6s, IMO. Check out that thread link, Chaka explains it all really well.

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Ok thanks! I’l take a look into it, just was trying to hopefully keep costs down with a lower voltage ESC, but I’ll keep looking I guess.

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@Ulfberht So Would this be closer to Ideal then With either a 10s battery or two 5s’s in series? http://www.hobbyking.com/hobbyking/store/__38787__Turnigy_Sentilon_V4_100A_5_12s_HV_Bulletproof_Speed_Controller_w_RPM_Sensor.html

@Jinra What exactly are you referring to about monitoring the voltages and using fuses? Is this in regards to charging the batteries? Should this info be displayed on the charger or do I need to break out the DMM? Sorry for all the questions, I’m new to LIPO’s

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Fuse for overcurrent protection. Monitoring voltage meaning not letting it completely die and damage the lipo.

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@dstnceswmer That one looks pretty good. I like how it has spark suppressor connections on the positive power lead. One less thing to worry about wiring up. If you need to power anything else, you will need to add a BEC. Cheap and easy. If you do go with this one, I’d suggest getting a programming card with it(around $10). Makes is a lot easier to get everything tuned up. You can also program using the controller on this model, but I don’t know if that would be easier or harder to deal with.

22

Awesome! As far as batteries go then am i correct in thinking it’s better to go with 2x 5s in series vs 1 10s. In terms of chargers it looks more affordable to find a 4/6s charger then a 10s one. Im assuming they would need to be disconnected and charged separately though?

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23

It’s essentially the same. The main difference being how you’re going to balance charge. The Imax b6 doesn’t support 10s charging so you’ll have to charge each 5s pack individually. You can go with a single 10s pack but you’ll have to find a charger that supports it.

I would wire 2x 5s packs using a series adapter (xt60 or other head) and charge the 2 packs individually.

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Yes sir! Much more affordable to charge 2x5s packs in parallel! Plus you have to consider space. 2 smaller packs will give you a lot more flexibility for fitting everything on your build! There are tons of videos on Youtube about it, but here’s a link to Dexter@ discussing it. https://www.youtube.com/watch?v=ydhyWHsc9rg https://www.youtube.com/watch?v=ydhyWHsc9rg

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Thank you I can see it

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@longhairedboy @Ulfberht

Ok so here’s my new electronics parts list, Look ok?

Also I am around 175lbs, wondering what kind of top speed I could expect with this setup? And how it would do on average hills?

-Thanks in advance :slight_smile:

27

Looks ok but not too sure if that ESC will work. That ESC might have a firmware for an airplane/heli. With 6S, you should be able to get about 18-22mph. That 149kv though is pretty low KV so you might even be way less then that as far as mph goes.

1 Like