LTC6802 based 12 cell slave.

Threads relating to the BMS system begun by Peter Perkins

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ElectricBicycleLove
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Re: LTC6802 based 12 cell slave.

Postby ElectricBicycleLove » Mon Apr 01, 2013 11:01 pm

GregsGarage wrote:I couldn't decide on a case for the pcb so I chose 3. :shock: Here's a board outline that will fit several cases.

I'm going to get some prices and check lead times.

If you use a 3D printer you can get a case in 30 minutes and cheap :-)

I am not good at design... here are enclosures designed by me and printed on my printers of the time:
Image

Image

GregsGarage
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Re: LTC6802 based 12 cell slave.

Postby GregsGarage » Wed Apr 10, 2013 9:04 pm

3D printing looks fun and great for one-offs, but I am looking for quick assembly. So here's the plan.
Image
The board sits inside the case. I am getting some prices to have new end panels laser cut from a sheet of clear perspex. One A4 size sheet gives me enough end panels for 20 cases. For extra protection from the elements a little bit of sealer around the joints and where the connectors poke through should make them nearly waterproof. :D
Greg Fordyce

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Re: LTC6802 based 12 cell slave.

Postby GregsGarage » Sat Jun 29, 2013 11:27 am

It's been a while, got sidetracked by life in general :shock: but the boards arrived from China about a month ago. I've just ordered some bits to make up 10 slaves and see if they work. I am also going to see about getting some 1.6mm clear perspex laser cut for the end panels.

Here's one board with just the connectors soldered on so I can measure for the end panels. I don't suppose anyone has access to a laser cutter?
Image
Last edited by GregsGarage on Sun Jun 30, 2013 12:05 pm, edited 1 time in total.
Reason: Replaced image.
Greg Fordyce

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Re: LTC6802 based 12 cell slave.

Postby GregsGarage » Mon Jul 15, 2013 10:39 pm

I've got 2 boards made up, bench tested and in their enclosures. I am going to fit them to my back battery box but will first have to redo the cell conection wiring. I made adapters that allowed me to connect the previous version in parallel with the old bms, but I didn't do a very good job on some of the connectors. So out with the old and in with some new wiring, when I get the time that is! :shock:

Image

Image
Greg Fordyce

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retepsnikrep
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Re: LTC6802 based 12 cell slave.

Postby retepsnikrep » Tue Jul 16, 2013 4:17 pm

Nice progress that looks pretty cool.
Regards Peter

Two MK1 Honda Insight's. One running 20ah A123 Lithium pack. One 8ah BetterBattery Nimh pack.
One HCH1 Civic Hybrid running 60ah A123 Lithium pack.

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Re: LTC6802 based 12 cell slave.

Postby GregsGarage » Fri Oct 25, 2013 11:45 pm

I wanted to try out upverter for pcb designs so I've done a layout for the master to slave interface which has been in my todo box for a while now. :roll:

Image

http://upverter.com/gregfordyce/080adabe36ab70b6/EVBMStoTTLinterface/#/
Greg Fordyce

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