The battery builders club

I pray to god Sur-ron gives this guy another bike after how professionally he dealt with that fire.

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Has anyone an .apk for an android smart bms app? LTT’s website is down, and the ones that can be found in the play store can’t change any settings or don’t even connect.

damn I wonder what happened to them. Hopefully you find the APK, but there is a shitty version of this app available on the play store. It has less features but does show you all of the voltages and temperatures.

The one on the AppStore that works only shows overall voltage and temp, nothing else. :confused:

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ant bmw newest app Android_English.apk (1.6 MB)

That’s the one I was given, pretty universal for all antbms based boards.

This is the way to make a parallel connector from my battery to power esc and lights?

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I would be very wary drawing high current through either connector since you’re relying on solder to carry 100% of the current. You’re better off using a very small section of copper braid or stranded copper cable soldered as a bus across all 3 connectors. But if you’re drawing <10A you’re probably fine.

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I dont have any copper braid, is it okay to do it this way instead? One connection will go to my esc which is a huge current draw (~100a) and my accessories will be max 15a altogether.
image

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I wouldn’t trust those puny wires with 100a. Now, I know you arent gonna be drawing 100amp continuous but its not worth the risk.

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I would wire up a xt30 onto the battery pack itself to run your accessories.

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Oh no not that specific picture, I will be making the esc connection with 10 awg and then accessories with 16awg. Also please help, the FS antispark switch is 8awg but I have xt90 and it doesnt quite fit, can i strip some of the strands to make it fit?

This sounds like a good idea. If you can do this, then do it.

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I dont have any xt30, I would prefer to save money and work with what I have as long as it’s okay. I have quite a bit of wires and 5 sets of xt90s. Looking at the details more closely it looks like I won’t need to make a 2:1 y split xt90 connector? (Three 1:1 connectors and one 2:2 connector). In this plan I cut off the o ring crimped connectors which will save money on buying crimping stuff.

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Run your lights off the back side of your charge port. That way if you leave them on accidentally the BMS will cut them off.

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I dont know what this means. Isn’t it already going to cutoff my lights if I leave them on because its discharging from the bms according to my picture? This is in contrast to the direct connection to battery that the esc has.

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anyone knows where those battery can be bought?

idk how to make a time stamp so time is 1:15

EDIT: I found it http://www.ebaracus.com/product-category/eig the chemestry is LiNiCoMnO2 (Lithium, Nickel, Cobalt, Managnese and Oxygen ??) shot them with an enquiry to know the price and availability

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Let us know, I don’t expect it to be cheap but that’s a lot of energy in a small space.

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my guess would be around 40 to 60 USD per cell but the more you get the less it’ll cost I guess.

12s 1p doesn’t seem to be that big if you have a top enclosure and you’d have more than enough amps (10C 20Ah)

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NMC chemistry (these cells) is used in a bunch of the round cells we use so it’s pretty standard. Note that these cells are limited to 3.0V to 4.15V to meet their cycle life specs. Not a big issue but needs to be taken into account when choosing a charger and setting up the BMS.

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the Battery God has spoken

okay good to know!

potentially better for an Ebike than Esk8 tbh but who know