Andy48 Posted January 5, 2022 Share Posted January 5, 2022 This sounded interesting. https://electrek.co/2022/01/05/doe-stanford-researchers-bring-dead-lithium-batteries-back-to-life/ One day we might get chargers capable of doing this. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted January 5, 2022 Share Posted January 5, 2022 With any luck a new technology will arrive, cheap and with household products to keep if going, like my wife,,,? Quote Link to comment Share on other sites More sharing options...
Geoff S Posted January 5, 2022 Share Posted January 5, 2022 Your wife is cheap? ? Quote Link to comment Share on other sites More sharing options...
Don Fry Posted January 5, 2022 Share Posted January 5, 2022 I think he means Swmbo is in charge of kitchen stuff. Mine has replaced in the last six weeks, washing machine, dryer, food processor. Economy replacement, no. Don’t argue if wise. It is possible such technologies are available. For example, if food were more expensive, chimney cleaning might be cheaper. Small flame at the bottom might encourage climbing speed of the child as well.. Quote Link to comment Share on other sites More sharing options...
Nigel R Posted January 5, 2022 Share Posted January 5, 2022 The most important two words in any marriage... Yes, dear. Quote Link to comment Share on other sites More sharing options...
Don Fry Posted January 5, 2022 Share Posted January 5, 2022 One word, sorry. Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted January 5, 2022 Share Posted January 5, 2022 Getting back OT... A cursory glance seems to suggest the secret of an extended life is a quick high rate discharge after charging...that's just what I do with my EDFs! Quote Link to comment Share on other sites More sharing options...
Dickw Posted January 6, 2022 Share Posted January 6, 2022 Or with my F5B when I take 180 amps from a 1500 mAh Lipo. Should last forever ? Dick Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted January 6, 2022 Share Posted January 6, 2022 Tesla already claim the loss of capacity is only 3% after 1000 discharges. That's 250,000+ miles. If that proves to be true what loss of range would be unacceptable? 20% or a million miles? There is some evidence to show that mechanically an electric power train could actually last that long (but not the steering or suspension!) however not sure about the fancy electronics. A good period of sun spot high energy radiation could do serious damage. I suspect diagnosing & replacing the electronics would make battery replacement look easy & cheap. Quote Link to comment Share on other sites More sharing options...
MattyB Posted January 6, 2022 Share Posted January 6, 2022 (edited) 8 hours ago, Simon Chaddock said: Tesla already claim the loss of capacity is only 3% after 1000 discharges. That's 250,000+ miles. If that proves to be true what loss of range would be unacceptable? 20% or a million miles? That seems a bit optimistic - their own latest figures indicate it's more like 10% in 200k miles, though there is a bit a variance across the different cell cehemistry and pack sizes they have made over the years. It's impoortant to remember though that EV batteries discharge at far lower rates and are managed far more carefully by their on board BMS', heat pumps etc. than our RC packs, which have a very hard life by comparison. Edited January 6, 2022 by MattyB Quote Link to comment Share on other sites More sharing options...
Christopher Wolfe Posted January 7, 2022 Share Posted January 7, 2022 Regarding storing LiPo batteries, I have found that a balance discharge to storage voltage and then placing them in the workshop fridge at about 4 degrees Centigrade preserves them such that many months later the pack voltage loss is hardly measurable. This makes sense to me as chemical activity is usually slowed down at reduced temperatures. The downside is that packs require to be removed from the fridge at least 24 hr before re-charging and use. 6S 5000mAh packs. Chris Quote Link to comment Share on other sites More sharing options...
Nigel R Posted January 7, 2022 Share Posted January 7, 2022 As a side note, industrial applications can and do include heating elements packed in between cells to keep things nice and toasty. Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted January 7, 2022 Share Posted January 7, 2022 The RC car brigade often keep their LiPos in little heated containers...... Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted January 7, 2022 Share Posted January 7, 2022 I assume this is in preparation for use - where a warm pack will deliver its energy more efficiently. I’m told that it’s standard practice to heat packs for demanding competition in F5b and I expect this applies to any competitive high performance discipline. I’d expect the car brigade’s storage regime to be the same as ours though. Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted January 8, 2022 Share Posted January 8, 2022 Yes, and yes. Quote Link to comment Share on other sites More sharing options...
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