Life expectancy of Bosh LiIon batteries - Printable Version +- Woodnet Forums (https://forums.woodnet.net) +-- Thread: Life expectancy of Bosh LiIon batteries (/showthread.php?tid=7365536) Pages:
1
2
|
RE: Life expectancy of Bosh LiIon batteries - EricU - 11-08-2021 I have seen a lot more power tool battery repair videos cropping up, particularly Dewalt. Not bosch, but I imagine most of the top brands are using cells from the same few factories. So the question is, how long has Dewalt been selling liion batteries? A quick google search reveals it was in 2011-ish. So the failure rate has started going up at about 10 years. Only battery I have that won't charge is a Chinese clone, one of two. I shouldn't have let it discharge so much. Not sure it's worth repairing. RE: Life expectancy of Bosh LiIon batteries - kurt18947 - 11-11-2021 (11-08-2021, 10:16 AM)EricU Wrote: Only battery I have that won't charge is a Chinese clone, one of two. I shouldn't have let it discharge so much. I'm pretty sure LiIon cells can be damaged if they're too deeply discharged. I know the Bosch batteries have circuitry to disable the battery before they're damaged, I imagine other reputable manufacturers have similar. The drills won't really slow down as the battery discharges. It goes from running full speed to off. Put the battery on the charger and a few minutes later it's as good as new. RE: Life expectancy of Bosh LiIon batteries - EricU - 11-13-2021 Dewalt has a very simple circuit in their batteries that doesn't do much, I'm pretty sure you can over-discharge them. The only protection is the charger won't charge a battery pack that's too unbalanced. If you go looking on youtube, there are videos about brand new dewalt batteries that won't charge. I'm not sure I understand how that happens, but there are ways to balance them. It seems to me that a circuit to keep a battery from over-discharging would be somewhat unlikely. But I imagine someone has looked at that between the various brands. RE: Life expectancy of Bosh LiIon batteries - kurt18947 - 11-15-2021 (11-13-2021, 07:41 AM)EricU Wrote: Dewalt has a very simple circuit in their batteries that doesn't do much, I'm pretty sure you can over-discharge them. The only protection is the charger won't charge a battery pack that's too unbalanced. If you go looking on youtube, there are videos about brand new dewalt batteries that won't charge. I'm not sure I understand how that happens, but there are ways to balance them. Here is a paper about overdischarge in lithium-ion batteries. It is pretty advanced and I don't claim to understand 98% of it. https://www.nature.com/articles/srep30248 Quote:Abstract |