Search found 2379 matches

by agniusm
May 16 2019 1:23pm
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

Here is another battery. This one is 20S7P vtc6 inside. Wired with 25A pcm with separate port for charging.

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by agniusm
May 16 2019 1:20pm
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

All I see in the Daly results are multi-port boards, what we usually call BMS. I assumed you meant the per-cell modules, where each protects one cell? Could you link to the specific one you ordered? Besides the current, what led you to choose it, as opposed to the others available? And is there a p...
by agniusm
May 16 2019 4:00am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1271
Views: 146837

Re: bluetooth BMS?

Whenever not cycling, bring to storage SoC and isolate the cells from everything, including BMS. In any case check on them at least every few weeks, more frequently at first, then scale back as you see what self discharge actually is. Just forgetting about them is not an option, maybe not as bad as...
by agniusm
May 15 2019 1:00am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1271
Views: 146837

Re: bluetooth BMS?

I have contactor which cuts off the battery and only bms stayed connected. Cells were from nkon.
I have checked all my modules. All at 0.02V :D
by agniusm
May 15 2019 12:42am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1271
Views: 146837

Re: bluetooth BMS?

It was 20S6P battery. I assumed all was good and left it for 3 months. It should not be the practice for the hardware to malfunction or bad design. You should not seitch off bms, its added complexity. You will forget to do it eventually. Further more there should be notes on such conditions but what...
by agniusm
May 14 2019 11:36pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1271
Views: 146837

Re: bluetooth BMS?

If its an unfixable issue, they go to the bin or at least to last drawer for the time being. Its unacceptable.
by agniusm
May 14 2019 11:21pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1271
Views: 146837

Re: bluetooth BMS?

I have installed this BMS last year. Over the winter i left my battery unattended and this BMS drained it flat. Had brand new cells that went to the bin. Had no chance to go through all the posts but is this known issue? I have 2 of them, 15S and 20S. Balancing and charging was ok but parasitic drai...
by agniusm
May 14 2019 10:54pm
Forum: Battery Technology
Topic: A123 Pouch Cell Failure?
Replies: 17
Views: 924

Re: A123 Pouch Cell Failure?

I have 2 cells from those days. Shoot me pm and i can probably ship it cheap. my tabs are cut short (8-9mm) and was intended for my kit back in the day
by agniusm
May 14 2019 2:10pm
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

I tend to agree to disagree :lol: The good thing about PCM's is that its blunt as a boot so not too much that could go wrong with the hardware. I had one running for 7 years balancing and charging cells. I have destroyed that pack on vacation when my 43.8V charger died and i took 54V with me and my ...
by agniusm
May 14 2019 10:44am
Forum: Battery Technology
Topic: Is PCM good enough to replace BMS?
Replies: 13
Views: 1638

Re: Is PCM good enough to replace BMS?

I am sorry that I might have some misunderstandings on PCM. From the internet, I found that some PCM can have balancing function in addition to over charge and over discharge protection. Then what is the difference between PCM AND BMS? Could someone please tell me? This my own explanation so dont t...
by agniusm
May 14 2019 10:22am
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

Is that like a subset of BMS functionality? Link? According to the crowd, its bms but majority of the stuff people use is pcm, protection circuit module. It does balancing at hard preset value, does over current, under discharge and suposedly overcharge. Some does single or 2 point temp protection....
by agniusm
May 14 2019 4:11am
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

I have ordered couple PCM's. This one is 60A common port. Was initially thinking about installing separate port low power to drive a relay but this will do for the bike i have.
Finished battery with PCM installed:

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by agniusm
May 14 2019 2:38am
Forum: E-Bike Technical
Topic: Kelly KLS-S 72v controller wiring
Replies: 2
Views: 285

Re: Kelly KLS-S 72v controller wiring

You can skip the contactor. A fuse is good enough. This is directly from Fany @ Kelly. You still want to use the big green resistor that came with the controller anytime you connect the battery to the controller. This will help to slowly fill the capacitors in the controller and also help reduce th...
by agniusm
May 14 2019 2:28am
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

I will eventually buy some when I can finally afford it (time will come)... Matador Depending on what you need, i have couple 10S sets at 30% off. They are older iteration but work just as new. The new ones were updated with minor additions, like a notch to the lid for easier opening, chamfers etc ...
by agniusm
May 14 2019 12:42am
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

https://www.electric-skateboard.builders/uploads/db1493/original/3X/a/e/aec4b188fee925221e1de56ffc58efc1e1660b39.jpeg Looks promising, and good to see someone doing some bench testing here! If I may, I'd recommend designing those bolted connections in such a way that the 3D printed plastic isn't be...
by agniusm
May 14 2019 12:32am
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

Must say that Agniusm's work look really solid ! Best solderless product i've see on the market. I will eventually buy some when I can finally afford it (time will come)... Agniusm are you an engineer ? I can't help but think you are looking how solid you know the specs of your designs... Matador T...
by agniusm
May 13 2019 4:17pm
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

Grantmac wrote:
May 13 2019 3:04pm
So it's not simply a question of scaling the holder?
No. The tabs that go inside are custom punched. Then foam die cut as well
by agniusm
May 13 2019 1:35pm
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

Grantmac wrote:
May 13 2019 12:44pm
I'd love to see this scaled up to 26xxx series cells since there are a few offering excellent wh/$ these days. Plus many less connections to make.
I wont have 26650. 21700 should be mid summer. Compatible with 20700 if you dont mind wasted space.
by agniusm
May 13 2019 1:34pm
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

What size do you think the 20s7p pack will be ? Good work. Single module is 22x74x142 (bolts caps, bus bar, add 10mm) You can arrange them in over 4 configurations so i cant give you the size. One after another, front to back will be 440x74x142mm. Split that in half and you have 220x148x142mm. Then...
by agniusm
May 13 2019 11:14am
Forum: E-Bike Technical
Topic: Kelly KLS-S 72v controller wiring
Replies: 2
Views: 285

Kelly KLS-S 72v controller wiring

I have this controller and wiring diagram shows contactor. Would it be ok to wire it without contactor or would it drain the battery? Those chickers ar bulky and i would rather not use it. My intuition tels me that in most cases fuse would suffice? I do not dischargw through bms and my bms P- drives...
by agniusm
May 13 2019 10:55am
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

john61ct wrote:
May 13 2019 5:50am
OK, looks good, I guess that solid metal cell holder snaps into the colored plastic boxes?
Cell holder is petg plastic. That metal is tin plated copper and its fitted beforehand. To be more accurate, cell snaps into assembled holder.
by agniusm
May 13 2019 5:11am
Forum: Battery Technology
Topic: Rebuilding a Segway I2 Battery
Replies: 5
Views: 401

Re: Rebuilding a Segway I2 Battery

I did rip it apart. Its 18650. It's all glued together.
https://endless-sphere.com/forums/viewt ... ay#p904202
by agniusm
May 13 2019 4:07am
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

Your question: "how do you ensure a solid heat resistant connecton with the cell terminals?" is unclear. Couldn't you just do your best to try to actually **answer** the question? I have to understand the question to be able to answer it. I cant just sit and write a column if someone just flicks fi...
by agniusm
May 12 2019 6:48am
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

Thats the challenge you solve when you do a solderless pack. As many ways to solve it as your creativity supports. It seems like an easier challenge IMHO than solving thermal damage to cells. no, that is the challenge that the designer of this sytem should have solved and i am asking how he did tha...
by agniusm
May 11 2019 11:34am
Forum: Battery Technology
Topic: Solderless weldless 36V and 74V batteries could do over 200A
Replies: 54
Views: 4019

Re: Solderless weldless 36V battery could do 200A

ah I see -- the red "channel" is a custom part for tidying up the balance wires. (I thought this was a new design) What would such a custom channel cost in addition to the modules? M I have started offering new service. Whoever purchases battery kits can ask for custom parts. It could be bms enclos...