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Linsight Designer
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Discussion Starter · #803 · (Edited)
Best case would be end of November... that's if there aren't any major problems with RevC PCB (which I won't receive for at least another week). @Bull Dog is a beta tester, so I'll come up with a more minimal 'quiz' for that kind of early adopter. It'll probably only have a few questions, but all TBD.

...

Unrelated:
Here's a proof-of-concept video showing the mechanicals that adapt an 18S module to 12S:
For those that haven't been following along, this is useful because LiBCM will only initially support 48S (i.e. QTY2 18S & QTY1 12S modules). There are probably around QTY800 18S modules (enough for QTY400 cars), whereas there are probably only around QTY80 12S modules (enough for QTY80 cars). These are both guesses. Anywho, the 12S availability is no longer an issue.

FYI: Those leftover QTY6 cells will be useful for a companion product I intend to release sometime in 2022. I haven't specifically announced the product yet, but essentially it will replace the OEM lead acid 12 volt battery with a 3S2P lithium equivalent (i.e. QTY6 lithium cells). That will remove around 25 pounds from the vehicle. I don't intend to answer any questions about this product just yet, as it's a bit ethereal... but it's coming.
 

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Yeh I’m ready when it is. 😎
 
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Linsight Designer
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Discussion Starter · #805 ·
RevC PCB shipped!
I always love the small glimpse of the PCB that Seeedstudio sends:
Electronic instrument Computer hardware Font Electronic component Electronic engineering


Seeed isn't the cheapest PCB manufacturer, but they do GREAT work! We use them for all our PCBs. If you're ever looking for a PCB manufacturer, I recommend Seeed. And no, they didn't pay me anything to say this.
 

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Linsight Designer
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Discussion Starter · #807 ·
Can it be assumed that 18S+/18S-/18S+ is the ideal 54S pack configuration?
No idea... haven't done the research yet. It'll either be 18S+/18S-/18S+ or 18S-/18S+/18S-. If I had to guess, I'd say 18S+/18S-/18S+ is the more likely "ideal" configuration.

Note that 54S is not initially supported... only 48S is.
 

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I finally opened my boxes and I have the 12s+ 18S-x2, 18S+X2. So one ideal set for this, one 18S+ to break up for the future unnamed project, and one potentially for an 'i'm tired' assist on my Greenspeed trike.
 
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Linsight Designer
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Discussion Starter · #810 ·
Correct:
-An 18S+ battery has the BMS connector on the positive side.
-An 18S- battery has the BMS connector on the negative side.

...

The RevC PCB should arrive tomorrow. However, my Pick and place machine isn't working for some reason, which is going to make assembling the PCB super annoying if I can't fix it tonight. The built-in touch screen stopped displaying anything... I can tap on the screen (where I know certain buttons are) and the machine responds correctly, but I'm not able to build boards without feedback from the machine while it's placing.

Super frustrating.
 

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Engine-Off-Coast
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Automotive tire Steering part Motor vehicle Steering wheel Audio equipment


New LiBCM screen. I wanted to match the black and white OBDIIC&C screen I have.
 

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Linsight Designer
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Discussion Starter · #812 ·
The RevC PCB has arrived, and I am going to place it by hand... pick and place machine is dead in the water. I've never had any problems with it, all the way back to 2015... but now the screen is broken. Manufacturer says the machine is too old to repair, so I'm looking into reusing the hardware with openPnP... that's obviously going to delay things a bit.

Two other options for production boards:
-Buy a new machine ($$$$).
-Send it out to a contract manufacturer... but that's a logistical nightmare and I lose a bunch of agility.
 

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Linsight Designer
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Discussion Starter · #814 · (Edited)
It's a generic LCD, but is no longer in production. Last night I purchased several items from the same era with similar looking screens... maybe one will be the same. It's a long shot, but if it works it'll save me ~$8000.

Here's the first hand assembled RevC PCB, and a walk through showing the new addition to the manufacturing line (in my garage):

Now it's off to start testing whether the various improvements actually work.
 
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