Search found 2041 matches

by parabellum
Jun 12 2018 8:42am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 827
Views: 45873

Re: bluetooth BMS?

Or just buy a half-decent starter battery that can actually start the car? Just saying.... My battery is always top notch, last time I needed to jump start my car, was ~5 years ago and not because of bad battery, but because someone wanted to listen music all day long, on the beach, with engine off...
by parabellum
Jun 11 2018 6:32pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 827
Views: 45873

Re: bluetooth BMS?

Isn't that a bit high for a typical car? 4S is 16.8 volts I only use 4S to jump-start the car, so I do not have to wait at all. When using 3S, you need to wait for a minute to raise starter battery voltage and have some useful energy on starter battery side, with 4S it is start able right in the in...
by parabellum
Jun 10 2018 11:09pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 827
Views: 45873

Re: bluetooth BMS?

I will probably quit if cant do something the exact way I want to. 4S lipo in trunk is the way to go I suppose.
by parabellum
Jun 10 2018 10:45pm
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1567
Views: 158830

Re: Thread for new battery breakthrough PR releases

LeonardoJanus wrote:
Jun 10 2018 5:36pm
100$/KWh is a fake. Impossible.
Really? I bought a box of Tenergy LiFePO 32650 5.5Ah 80x for 150USD (really around 5AH after testing), it is ~117USD/KW
by parabellum
Jun 10 2018 10:30pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 298
Views: 28935

Re: Suzuki GSX-R e899 K2

Nice!!!
by parabellum
Jun 10 2018 10:12pm
Forum: Battery Technology
Topic: My 38kw, 138v, 3.8kwh LTO Battery
Replies: 26
Views: 1455

Re: My 38kw, 138v, 3.8kwh LTO Battery

Those are actively bleeding when LED is on, I have no idea what they do when damaged, but it is interesting to know. What I did is just replacing units that did not glow up with >2.8V and they where cold, so no bleeding. Be careful, I have no way to develop statics, tile floor, glass tables, no sock...
by parabellum
Jun 10 2018 7:47pm
Forum: Battery Technology
Topic: My 38kw, 138v, 3.8kwh LTO Battery
Replies: 26
Views: 1455

Re: My 38kw, 138v, 3.8kwh LTO Battery

I do not see the bright red LED lighting. Do you perform tests on damaged unit?
by parabellum
Jun 10 2018 11:38am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 490
Views: 53222

Re: DIY assembly kit for 18650 without spot welding/Soldering

Edit to review: Bolt and Nut is alloy of brass an copper
by parabellum
Jun 10 2018 12:26am
Forum: General Discussion
Topic: ¿habla español?
Replies: 4
Views: 240

Re: ¿habla español?

It is probably trolling, because every not US citizen speaks several languages?
by parabellum
Jun 09 2018 11:23pm
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 490
Views: 53222

Re: DIY assembly kit for 18650 without spot welding/Soldering

Must say V2 kit is overall higher quality and consistency than V1, good job. Bus-bars: 0.5x8mm nickel coated copper, 4mm2. Contact spring: Contact neck is 0.75x6mm nickel coated copper, 4.5mm2. There is kind of stopper plate on the back side of the contact which is copper to and you will loose some ...
by parabellum
Jun 09 2018 8:36pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 827
Views: 45873

Re: bluetooth BMS?

You need to set up a accessories battery and a separate starterr battery. That way you can always start even if you drained the acc battery complelty. Looks like difficult, common ground is negative and screwed on the chassis all over the place, I must isolate all starter related electronics to the...
by parabellum
Jun 09 2018 1:34am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 490
Views: 53222

Re: DIY assembly kit for 18650 without spot welding/Soldering

I was fortunate to get several kits 2 weeks ago, being Urvakhsha a kind guy to offer them for testing, only got some relevant charger last week, Turnigy Reaktor 1000w 30A. I do not see a way to overpower, by metrics, present copper cross section area with available 30A but I hope I have enough serve...
by parabellum
Jun 09 2018 1:01am
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1160
Views: 179474

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

QSMOTOR wrote:
Jun 08 2018 9:32pm
5. Electric bicycle hydraulic disc brake system
What is the hose length to rear brake in this system?
by parabellum
Jun 08 2018 8:23pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 827
Views: 45873

Re: bluetooth BMS?

you dont want a bms on a starter battery. Not really, I would just do the rest of electronics but in our paradigm everything including starter is tied to ground in a car and BMS is interrupting negative. 4S..LOL...Uhhhh no...not likely, but there are balance boards that will do what you need. Balan...
by parabellum
Jun 08 2018 4:11pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 827
Views: 45873

Re: bluetooth BMS?

Is there any 4S BT BMS capable of 300A peak somewhere? The idea is to use it for LiFePO car starter battery and need to have adjustable LVC and common charge/discharge port.
Is there any mod to use 8-24S BMS for 4S?
by parabellum
Jun 08 2018 11:30am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 490
Views: 53222

Re: DIY assembly kit for 18650 without spot welding/Soldering

https://vruzend.com/product/vruzend-battery-kit-v2-0/ ***Currently only available on Kickstarter, where you can pre-order your V2 kit for a discount as part of our launch promotion! Check it out here!*** The VRUZEND V2.0 is our high power battery building kit. The caps are identical in size and shap...
by parabellum
Jun 07 2018 5:05pm
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 490
Views: 53222

Re: DIY assembly kit for 18650 without spot welding/Soldering

bobbill wrote:
Jun 07 2018 9:59am
.why the SS, not more conductive material?

Figure, plain copper strand would do, punched through middle to go around posts...would do better or nickel...
V2 is nickel plated copper.
by parabellum
Jun 07 2018 11:41am
Forum: Battery Technology
Topic: My 38kw, 138v, 3.8kwh LTO Battery
Replies: 26
Views: 1455

Re: My 38kw, 138v, 3.8kwh LTO Battery

Sunder,
What are those cells? (Specs, manufacturer)
Where did you get them?
by parabellum
Jun 07 2018 10:04am
Forum: Battery Technology
Topic: Best generic 18650’s
Replies: 4
Views: 359

Re: Best generic 18650’s

Look here as well.
viewtopic.php?f=31&t=61608
by parabellum
Jun 01 2018 7:58pm
Forum: Battery Technology
Topic: Overcoming Zener Knee for BMS
Replies: 53
Views: 1504

Re: Overcoming Zener Knee for BMS

Yup
M5 is~4.7mmD
Board opening is 4.85mmD
Hole center to center 12.5mm
Board (widest on break off link) 36.5mmD
by parabellum
Jun 01 2018 9:18am
Forum: Battery Technology
Topic: Overcoming Zener Knee for BMS
Replies: 53
Views: 1504

Re: Overcoming Zener Knee for BMS

Hey Parabellum(or anyone else reading this thread that bought the above balancers). Could I ask a small favour ? I've ordered a whole bag of these, but the only option they had was economy shipping, so they won't arrive for another 4 weeks. In the mean time, I want to 3D print a retainer that will ...
by parabellum
May 29 2018 2:09pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 275
Views: 21073

Re: Nucular controller

Nice features set!
How is the FOC only behaviour at loaded start?
What happens in sensor or combined option if hall sensor fails?
by parabellum
May 28 2018 10:14pm
Forum: Battery Technology
Topic: LTO Lithium Titanium Oxide (Titanate) Battery 30S (now 32S)- Seeking the Ultimate Commuter Battery
Replies: 161
Views: 12644

Re: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery

Also, for charging I am considering purchasing one of these: https://www.ebay.com/itm/1500W-30A-DC-D ... 2739238019 In conjunction with two 12V server supplies I have isolated and put in serial. The limit will be the step up module, but this should allow me to charge at 20 amps versus getting a Mea...
by parabellum
May 25 2018 9:41am
Forum: Items for Sale - Used
Topic: Panosonic 25ah Prismatic cells for sale $28
Replies: 69
Views: 4009

Re: Panosonic 25ah Prismatic cells for sale $22

Thanks Eric!
That is mega fast shipping, 7 cells pack (13lbs) sent on Monday and my courier, in Florida, got it on Wednesday afternoon!
by parabellum
May 24 2018 2:18pm
Forum: EV Business World
Topic: Tesla Model 3
Replies: 620
Views: 37789

Re: Tesla Model 3

In my opinion Musk is doing right thing, producing cool, user friendly vehicles accelerates their acceptance and integration of this “exotic” technology. Good example: Smart phones where known for many years before I got one E-ten in 2006 and HTC in 2007 and felt out of place in my surrounding. But ...