eMark
100 kW
The single 8amp cell listed by BH has same spec "Recommend Continuous Discharge Rate 200A" ... https://batteryhookup.com/products/spim08hp-3-7v-8ah-200a-lithium-ion-w-cell-holder?pr_prod_strat=copurchase&pr_rec_id=4cafd1c48&pr_rec_pid=4863652692100&pr_ref_pid=5823231361186&pr_seq=uniform ... this link to that cell was posted under the photo of the electric pit bike ("14s1p 8Ah").DogDipstick said:Someone is asking me about them right now in Pm. My opinions. Advice. I know it is a 2p, in that ad, for that price... and... Yea I just remark, on how, next week, it will be " 1600A" in big red numbers plastered across the face of the website.... and in the small print... it will say " (4p)"
BH is in no way exaggerating the original datasheet as much as DDs exaggeration. Perhaps how DD chose to answer that ONE QUESTION ?? There are even a few youtube builds using similar salvaged pouch cells.
Will BH say that their cells are no longer Grade A - NO - they figure any DIYer that's done their due diligence knows that the salvaged cells listed by BH are by and large Grade B.
Nothing wrong with that as long as the buyer realizes capacity between salvaged cells will vary so pre-testing is mandatory. Will i ever buy cells from BH ... doubtful ... other than as an experimental learning experience (if nothing else to do) that i don't envison at this time.
My reason for mentioning "200A" was as much in jest (see what reaction). These cells are no longer Grade A ... so chances are that the "RCDR" is closer to 100A. That's why the price seems so reasonable. In other words pre-testing is mandatory as some of the cells may not be fit for the task. However, that in NO WAY should be construed as belittling common sense DIYers and their builds using salvaged cells that still have a life to give/live (e.g. Chalo) :thumb:
YES! BHs salvaged cells are not only for the serious DIY builder, but also for a hobby build. Always will be a few "hobbyists" who are an easy mark ... perhaps giving Battery Hookup what some may view as an unfair rap.DogDipstick said:Get out that old Extech thermocouple datalogger, Old man. I guess it is not very profitable to do this. Load testing. For a hobbyist market.
As P. T. Barnum once said ... “Advertising is like learning - a little is a dangerous thing.”DogDipstick said:I gotta shut up now cause I have kinda been bribed NOT to talk trash on these cells. WhoopTee.
That doesn't mean those cells don't have a suitable use for the right application as shown in some of BHs build projects ... https://batteryhookup.com/pages/customer-projects
BH only says what the datasheet Grade A rating was - NOT - as a salvaged DIY application.DogDipstick said:It is not hard to datalog a 200A load continuous with congruent temperature data. Flir cam is 1000$, datalogger from Grin is 300$, boom, data. Volume of water in a bucket, a thermometer.. and a resistor load... Count the BTu produced easily from any certain discharge. Have it on a log. Get out that old Extech thermocouple datalogger, Old man. I guess it is not very profitable to do this. Load testing.
That was what i was hoping to get across ... that those 2p 16Ah pouch cells are more powerful (mismatch) then CS needs for his e-bike application. Wasn't that what DD was also attempting to say in a round-about manner of speaking :wink:CONSIDERABLE SHOUTING said:I have no plans yet to even push 100 Amps through something like a Grintech controller, so even that would be perfectly fine for my (current) needs. I ABOLSUTELY need to be spot-welding 18650s and playing around with making smaller packs
It's not that those 2p 16Ah cells don't have a suitable application, but IMO not for CSs use. What DD was saying in so many words (reading between the lines :wink: ). He wasn't so much bad-mouthing Battery Hookup as much as having empathy for the "hobbyists" that are an easy mark (quote by P. T. Barnum).
Another thing to consider is the potential danger of a "lhobbyist" working with powerful EV pouch cells that could burn down a house if mishandled
You come across as a "hobbyist" when you use words like "playing around" :wink:CONSIDERABLE SHOUTING said:I ABOLSUTELY need to be spot-welding 18650s and playing around with making smaller packs
Lishen 2170 less expensive (more bang for $) than Samsung 25Rs. Check prices in quantity you need at Battery Store ... https://www.18650batterystore.com/collections/18650-batteries/products/samsung-25r-18650
Besides price what's an advantage buying either Lishen 2170SA 4000mAh 12A (12s3p 135$) or Lishen 2170LA 4000mAh 35A (12s3p 202$) ... instead of say 1865 Samsung 25R 2500mAh 20A (12s4p 213$) or 1865 Molicel P28A 2800mAh 35A (12s4p 255$).