paddy72's latest activity
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Ppaddy72 replied to the thread Looking For As from 9Ah- 26Ah (12Volts) Second Life Lithium Ion Batteries.It has a reason why the overland lines always run on HV ;) On the other hand when the PV is rather small (low wattage) and the light...
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Ppaddy72 replied to the thread PV wiring when in shade.O.k. - understood the problem. 'terraced houses' would be called 'Reihenhäuser' in Germany ;-) Yes, if it looks like this the problem is...
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Ppaddy72 replied to the thread PV wiring when in shade.If it's a legal grey area i would make sure the PV is accepted before i would invest or even install the panels ;) If PV is allowed i...
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PIt's about availability, quality, price to meet the design of your battery. ebike batteries are generally limited in size - so high...
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Ppaddy72 replied to the thread PV wiring when in shade.Just for curiosity: what local law prohibits to remove a chimney that isn't used any more? Is this a special style old house that needs...
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Ppaddy72 replied to the thread Looking For As from 9Ah- 26Ah (12Volts) Second Life Lithium Ion Batteries.Are you talking of lead-acid batteries or Li-ion? There are also different Li-ion chemistries like NMC, LCoO or LFP and others. Also...
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Ppaddy72 replied to the thread Acceptable price for Automotive cells.A 6 kWh pack for 350 eur sounds supprisingly cheap. For a tesla modul (3) with 5,35 kWh you normally pay around 1000 eur. How does he...
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Ppaddy72 replied to the thread newbie - need help with Segway 73.6V 5600 mah battery.It could be a bad BMS 7 BMS error or cell problem (low capacity, self-discharge, e.g.) If the cells packs a individually fully charged...
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Ppaddy72 replied to the thread TP4056 current overhead?.I use TP4056 for at least 2,5 or 3 years to charge my 18650 cells - for each cell one TP4056 - 4 or more in parallel on the same voltage...
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Ppaddy72 replied to the thread What spot welder are people using these days?.If you're really into DIY here is a spot welder build from an old welding transformer with a new secondary winding in 120mm2 copper (4...
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Ppaddy72 replied to the thread Nickel Iron batteries.Nickel iron (edison) batteries are probably one of the most durable and stable batteries available but they also have downsides compared...
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Ppaddy72 replied to the thread Fast Charging - 500a @ 400v = 200kw - WOW.Yes, the power is impressive but high power input and output means additional measures to cool down the battery (which decreases the...
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Ppaddy72 reacted to Oberfail's post in the thread Fast Charging - 500a @ 400v = 200kw - WOW with
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I'd be interested in how long those batteries will survive being treated that way. Its not hard to design a battery that can be charged... -
Ppaddy72 replied to the thread Cause of heater-effect at around 4.0V and high self discharge at full voltage (4.2 ... 4.0V).Interesting theory and i have thought of something similar. The building and growth of dendrites is quite mystical to me (and probably...
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Ppaddy72 replied to the thread Cause of heater-effect at around 4.0V and high self discharge at full voltage (4.2 ... 4.0V).Yes, this can happen a few times. With some luck you will reach the 4.2V at the end (often needs some attempts), but some cells will...