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Questions about 100AH build.
#11
Can someone please confirm that my diagram is correct to start building the pack?
This will be my 1st 4s7p pack and then i plan to create more packs like this in parallel to keep the same voltage.

Thanks!
   
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#12
anyone?
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#13
Considering it's been over 24hrs, I figured someone else would reply.

I think it looks right. It took me a little bit to work out the way you were wiring things because of the angle you have your packs. Maybe if you had them in isometric view instead of orthographic it would of been easier to identify. But that's just me.
Also different color wires for each one would of been good Wink

But, I think that's right.
Proceed with caution. Knowledge is Power! Literally! Cool 
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#14
Thank you very much for your reply.
Can i put fuse wires on this pack connecting the cells for more safety?Cause i've seen lot of people doing this on YT but they use parallel packs, i wonder how to do in series.

About the BMS wiring, does it have to be a sequence or should i be aware of something else?Or is it ok like i plan to do:B1,B2 on the bottom on the middle that there are 2 series and B3 on the top on the last series on the center.
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#15
(01-23-2019, 03:22 PM)alex_1978 Wrote: Can someone please confirm that my diagram is correct to start building the pack?

no, you seem to have b2 and b3 mixed up.

and polarity to the charge controller is reversed.


Hope That Helps.
Korishan likes this post
--    ----    ----    ----    ----    ----    ----    ----    ----    ----    --
all systems nominal... rock on.
-----------------------------------------------------------------------
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#16
(01-24-2019, 04:38 PM)DCkiwi Wrote:
(01-23-2019, 03:22 PM)alex_1978 Wrote: Can someone please confirm that my diagram is correct to start building the pack?

no, you seem to have b2 and b3 mixed up.

and polarity to the charge controller is reversed.


Hope That Helps.

yes, correct. Thnx DCkiwi. They are reversed.

(01-24-2019, 04:28 PM)alex_1978 Wrote: Can i put fuse wires on this pack connecting the cells for more safety?Cause i've seen lot of people doing this on YT but they use parallel packs, i wonder how to do in series.

About the BMS wiring, does it have to be a sequence or should i be aware of something else?Or is it ok like i plan to do:B1,B2 on the bottom on the middle that there are 2 series and B3 on the top on the last series on the center.

I wouldn't put fuses between series connections. There's no need to put fuses between each pack, it serves no purpose at all. Especially since 1 fuse at the end of the string between string|charger and string|inverter is all that is needed.
You "must" connect them in the proper order, B-, B1, B2, B3, otherwise you will get to high of a voltage on the bms and possible blow it up. Like DCkiwi mentioned, B2 and B3 is backwards. Best case is the bms just won't turn on. Worst case is it blows up releasing the magic smoke.
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Certified 18650 Cell Reclamation Technician

Please come join in general chit-chat and randomness at Discord Chat (channels: general, 3d-printing, linux&coding, 18650, humor, ...)
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#17
DCkiwi you are right polarity on the charge controller! was just a mistake on the diagram and for sure i wouldn't do when connecting.
Can you please explain about the BMS wiring what is wrong?
Thanks!
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#18
get friendly with your voltmeter.

seriously!
--    ----    ----    ----    ----    ----    ----    ----    ----    ----    --
all systems nominal... rock on.
-----------------------------------------------------------------------
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#19
(01-24-2019, 04:49 PM)DCkiwi Wrote: get friendly with your voltmeter.

seriously!

Voltometer and i are very good friends  but before i blow the bms please advice Smile 
Can you explain me please what is wrong in the bms wiring?
are B- and B+ correct or should i connect somewhere else, cause this looks more normal to me.
B2 and B3 are mixed up, but B1 is correct?
So B2 should be B3 and everything else is ok?
Thanks!

this is what you guys mean?

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#20
(01-24-2019, 04:52 PM)alex_1978 Wrote: Can you explain me please what is wrong in the bms wiring?

sure ...

(01-24-2019, 04:52 PM)alex_1978 Wrote: B2 and B3 are mixed up, but B1 is correct
So B2 should be B3 and everything else is ok

thats it ...

(01-24-2019, 04:52 PM)alex_1978 Wrote: Thanks!

my pleasure.  please call again!  ;P

b1 and b3 MAY be reversed -- impossible to tell from your diagram. use voltmeter to check when making balance lead (to connect with BMS).

polarity to charge controller reversed (still).
--    ----    ----    ----    ----    ----    ----    ----    ----    ----    --
all systems nominal... rock on.
-----------------------------------------------------------------------
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