Search found 4564 matches

by DrkAngel
Dec 17 2019 9:47am
Forum: General Discussion
Topic: Raised Bed Gardening - Cement Blocks > Greenhouse!
Replies: 304
Views: 42613

Re: Raised Bed Gardening - Cement Blocks > Greenhouse!

Local paper wrote up a story about the Pantry's High Tunnel project and our "Green" method of growing fresh vegetables for the needy. Guess some "high-up" people took notice and a State Assemblyman presented a manager and I with "Certificates of Merit". Slow gardening season but keeping busy. Pantry...
by DrkAngel
Dec 17 2019 9:03am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 512356

Re: Homemade Battery Packs

Finally received shipment notifications on all items ... Plenty of projects to help keep me busy through the long cold Winter. . ... abbondanza Receiving a wealth of battery potential! Battery Hookup (alarmhookup on ebay) had-has a great discount on some recycled batteries. 36V 5.1Ah BMSed batterie...
by DrkAngel
Dec 16 2019 7:19am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 512356

Re: Homemade Battery Packs

Price just jumped! Bonus: just found 42V 5Ah Lithium charger with trimmable voltage for <$20! $20.99 alternate listing = best price! Check seller listings for various chargers , some with voltage trimmer, search "13s", "14s" or "15s" etc. . Price keeps changing, with various % discounts, many, pres...
by DrkAngel
Dec 14 2019 8:37am
Forum: E-Bike Technical
Topic: EBike Toolbox - Bargains! $
Replies: 152
Views: 62156

Re: EBike Toolbox - Bargains! $

.
...
10s 36V 5A Lithium charger with trimmable voltage - $19.97

Image

3s - 23s chargers - search by voltage or #s ... some with trimmable voltage, check pictures - descriptions
by DrkAngel
Dec 14 2019 1:21am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 512356

Re: Homemade Battery Packs

. ... 36V 5.1Ah "bricks" @ $24.99 Look to be of excellent quality. Annoying is the prevalent LEDs, Shipped at precisely 3.60V, BMS has a blinking blue LED, charging presents a blinking red LED and charged to 42.0V has a constant blue LED. Monitored charge through the charging leads shows a pulse ty...
by DrkAngel
Dec 13 2019 7:12am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 512356

Re: Homemade Battery Packs

. ... Resurrecting "dead" ( extreme low voltage Lithium cells ? ) Bought a quantity of Ryobi 20V and 40V batteries for recycling cells. I was at 1st dismayed to find none that would charge in oem chargers. Listed as for cell acquisition but still ... well, started opening packs and found cells were...
by DrkAngel
Dec 11 2019 6:27pm
Forum: E-Bike General Discussion
Topic: Rescue Motor - Aotema (Wilderness Energy BD-36)
Replies: 35
Views: 6008

Re: Rescue Motor - Aotema (Wilderness Energy BD-36)

Got 12 bricks coming today, will test to confirm capacity of cells and quality of BMS, and report. Got partial order today, called and was informed 10s2p bricks shipped by 3rd party, from California. (arriving "later") Having good initial success resurrecting Ryobi "40Max" battery packs, 18V Ryobi ...
by DrkAngel
Dec 11 2019 12:08am
Forum: E-Bike General Discussion
Topic: Rescue Motor - Aotema (Wilderness Energy BD-36)
Replies: 35
Views: 6008

Re: Rescue Motor - Aotema (Wilderness Energy BD-36)

Found a Schwinn frame with proper fork, and dual brakes, so will be transferring BD-36. Makes me feel better about "proper" brakes. As for speed with 36V battery, 23mph is inefficient unless continuous assist applied and "illegal", I just acquired a quantity of 10s2p 5.1Ah BMSed "bricks" with an int...
by DrkAngel
Dec 08 2019 2:22pm
Forum: General Discussion
Topic: Raised Bed Gardening - Cement Blocks > Greenhouse!
Replies: 304
Views: 42613

Re: Raised Bed Gardening - Cement Blocks > Greenhouse!

Reinitialized the Grow Tower, inside Pantry warehouse, to mature the Stevia cuttings and to keep blooming the small Marigolds that I potted up before the freeze set in. I keep the Marigolds in the grow tower till Pantry opens on Mondays and Fridays, then set them on the counters to brighten peoples ...
by DrkAngel
Dec 08 2019 12:32pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 512356

Re: Homemade Battery Packs

Copied from Optimal Charge Voltage thread - EVE ICR18650/26V looks to have greatest energy density between 15% and 60% (approximately from 3.5V to 3.7V) I will likely parallel enough 36V batteries to limit controller draw to <1C and limit charge dependent on anticipated need. 1 advantage is the abil...
by DrkAngel
Dec 07 2019 10:49pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 512356

Re: Homemade Battery Packs

Finally received shipment notifications on all items ... Plenty of projects to help keep me busy through the long cold Winter. . ... abbondanza Receiving a wealth of battery potential! Battery Hookup (alarmhookup on ebay) had-has a great discount on some recycled batteries. 36V 5.1Ah BMSed batteries...
by DrkAngel
Dec 07 2019 7:51am
Forum: Battery Technology
Topic: Optimal Charge Voltage - (LiCo)
Replies: 38
Views: 4644

Re: Optimal Charge Voltage - (LiCo)

EVE ICR18650/26V looks to have greatest energy density between 15% and 60% (approximately from 3.5V to 3.7V) I will likely parallel enough 36V batteries to limit controller draw to <1C and limit charge dependent on anticipated need. 1 advantage is the ability to "timer" charge at full Amps, depende...
by DrkAngel
Dec 07 2019 6:36am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 512356

Re: Homemade Battery Packs

. ... abbondanza Receiving a wealth of battery potential! Battery Hookup (alarmhookup on ebay) had-has a great discount on some recycled batteries. 36V 5.1Ah BMSed batteries, as low as $24.99 each (for 10x quantity) - got 12 8Ah LiPo cells 25-50C discharge and 15C charge $4 each - got 31 Ryobi 40ma...
by DrkAngel
Dec 05 2019 11:14pm
Forum: Battery Technology
Topic: Optimal Charge Voltage - (LiCo)
Replies: 38
Views: 4644

Re: Optimal Charge Voltage - (LiCo)

. Soooo ... everyone ... DrkAngel, Pajda, flippy, Tesla is in agreement that charging to higher voltages produces faster battery deterioration! Of course, but the main problem, which I am talking about is the level of deterioration at "higher" voltages. DrkAngel I have problem with the graphs in th...
by DrkAngel
Dec 04 2019 11:01pm
Forum: E-Bike General Discussion
Topic: Snow Beast Refurb
Replies: 39
Views: 6404

Re: Snow Beast Refurb

Repackaged 3 x 36V 4.4Ah Hoverboard batteries into collapsible Trench Shovel bag that I got free after ebay seller sent bag instead of pictured shovel. Slid heavy cardboard under batteries and pathed wires out the velcroed flap. 36V 13.2Ah.jpg At 42V the Snow Beast has good acceleration up to about ...
by DrkAngel
Dec 03 2019 8:03pm
Forum: General Discussion
Topic: Raised Bed Gardening - Cement Blocks > Greenhouse!
Replies: 304
Views: 42613

Re: Raised Bed Gardening - Cement Blocks > Greenhouse!

Nice, I would say, cold frame? Winter Greenhouse? At higher latitudes a five surface glazed greenhouse seems very inefficient. (4 walls and a roof) Optimal would have an insulted reflective Northern wall, and the Northern roof section, receiving little to no direct light could also be insulated, 3.5...
by DrkAngel
Dec 03 2019 9:46am
Forum: Battery Technology
Topic: Optimal Charge Voltage - (LiCo)
Replies: 38
Views: 4644

Re: Optimal Charge Voltage - (LiCo)

. Soooo ... everyone ... DrkAngel, Pajda, flippy, Tesla is in agreement that charging to higher voltages produces faster battery deterioration! And apparently everyone agrees that the severity of degradation is relatable to the specific cell formulation. The only stickler seems to be the advisabili...
by DrkAngel
Dec 01 2019 5:41pm
Forum: E-Bike General Discussion
Topic: Snow Beast Refurb
Replies: 39
Views: 6404

Re: Snow Beast Refurb

. ... Snow Beast Functional! Well mostly, took a nice ride. Chinese "Stainless Steel" chain had a "healthy" growth of rust ... penetrating oil and. eventually, hammer couldn't loosen it up. China SS.jpg So, new chain, loosened and lubed the brakes, cleaned and waxed the brake cables. Fresh batterie...
by DrkAngel
Nov 30 2019 10:42pm
Forum: General Discussion
Topic: Raised Bed Gardening - Cement Blocks > Greenhouse!
Replies: 304
Views: 42613

Re: Raised Bed Gardening - Cement Blocks > Greenhouse!

I helped a volunteer crew pull up all the dead plants in the High Tunnel. A balmy 75ºF inside. A few Pepper plants are still partially alive so waiting for more Peppers to ripen before pulling them out. Herbs, Parsley, Oregano, Rosemary and even Dill are still nice and healthy ... 2 Celery plants to...
by DrkAngel
Nov 30 2019 10:28pm
Forum: E-Bike General Discussion
Topic: Snow Beast Refurb
Replies: 39
Views: 6404

Re: Snow Beast Refurb

Dedicating tomorrow to Snow Beast prep. Cold lousy weather and already spent way too much on line, over $1000 on batteries alone. Got a dozen 36V 5.1Ah BMSed "Bricks", so wlll likely be building another 15 or 20Ah battery for the Beast. Will take a picture of the Chinese "Stainless Steel" chain as a...
by DrkAngel
Nov 30 2019 9:38am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 512356

Re: Homemade Battery Packs

Latest project items 10s2p with EVE icr18650/26V are usable between 4.2V and ~3.3V but have a very broad and high energy density between 3.5V and 3.7V, towards 50%. Well, starting at 42V and ending at 33V invokes a drastic and noticeable performance drop. Got to thinking, since I just got a bunch of...
by DrkAngel
Nov 30 2019 9:10am
Forum: Battery Technology
Topic: Optimal Charge Voltage - (LiCo)
Replies: 38
Views: 4644

Re: Optimal Charge Voltage - (LiCo)

Graph without exact definition of testing method and particularly tested cell sample should not be even published, just because you can not add your own measure to compare. Here you go ... https://www.researchgate.net/publication/303890624_Modeling_of_Lithium-Ion_Battery_Degradation_for_Cell_Life_A...
by DrkAngel
Nov 30 2019 3:29am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 512356

Re: Homemade Battery Packs

DrkAngel wrote:
Nov 29 2019 11:39pm
Bargain! Cells or 36V 5.1Ah bricks x 10 @ $24.99 each.
36V 5.1Ah

Limited time super bargains for this weekend!
Specs on the cells in the $25 36V 5.1A battery bricks - EVE icr18650/26V
Interesting is the 4.2V vs 4.1V deterioration chart.
by DrkAngel
Nov 30 2019 3:01am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 512356

Re: Homemade Battery Packs

Thanks, clearer now. Can they be wired in series for usage at 72V 20S charge with 2x 41V chargers at the midpoint tap long as isolated as is, leaving their BMS in place? Sounds feasible. I ordered up a dozen for various projects and spares. Plus some of the 200A Li-ion, Ryobi packs, 9s fireproof, A...
by DrkAngel
Nov 30 2019 1:50am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 512356

Re: Homemade Battery Packs

DrkAngel wrote:
Nov 29 2019 11:39pm
Bargain! Cells or 36V 5.1Ah bricks x 10 @ $24.99 each.
36V 5.1Ah

Limited time super bargains for this weekend!
fixed the link to 36V 5.1Ah batteries !