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Post by kris on Dec 26, 2019 14:11:05 GMT
Anybody know of a charger that would be suitable for a 36v lifepo4 30ah battery? Im thinking of electrifying one of my bikes, but the only 36v chagers i can find are really small amperages and would take for ever to charge a 30ah battery.
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Post by peterboat on Dec 26, 2019 16:42:01 GMT
Anybody know of a charger that would be suitable for a 36v lifepo4 30ah battery? Im thinking of electrifying one of my bikes, but the only 36v chagers i can find are really small amperages and would take for ever to charge a 30ah battery. Cris do you know how big a 30ah battery is? and its not up to what you think it is I have 30 x 36volts batteries that are 1.2kwh and they are fairly big |
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Post by Deleted on Dec 26, 2019 18:50:48 GMT
I thought kris was looking at the efficiency of charging a 36v ebike battery using something like a 5kva generator. Obviously it's no problem if you are on a mains connection but it is quite an interesting question if you are off grid ie relying on solar,generator and possibly some wind if it's windy. A 20 amp 36v Lithium Phosphate charger does seem interesting, if a 30ah lifepo4 battery block can handle that sort of charge input. As for high power ebikes there either needs to be a legislation update or some problems around driving licenses will occur me thinks . ETA the battery block itself isn't actually that big if it's just packed using heatshrink. Of course there is a fairly good chance that the battery Kris is referring to is in fact a LiPo which is a different kettle of fish altogether. If it is a LiPo then there are some radio control model chargers which can do fast charges. However LiPo have short lives in terms of recharge cycles. They do provide seriously high short term current but then you have to bear in mind that the rc plane you are in control of is quite a long way away so if it does go BANG it's not going to result in negative outcomes on a personal level. |
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Post by Deleted on Dec 26, 2019 20:19:10 GMT
Anybody know of a charger that would be suitable for a 36v lifepo4 30ah battery? Im thinking of electrifying one of my bikes, but the only 36v chagers i can find are really small amperages and would take for ever to charge a 30ah battery. That's a bit of a high ampe8age for a bike kris. Will the motor take that? What controller has it? You can get the chargers off Ebay, but as you say, the amperage you are looking at will take hours. Mine is 11 point something amps, and that takes 3 hrs if charged daily. A big charge takes 6 hrs. |
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Post by Deleted on Dec 26, 2019 20:30:15 GMT
I'm guessing kris is thinking of putting a 1000w+ hub motor kit on a mountain bike. Illegal but very effective, specially effective at getting away from the rozzers if they suddenly appear in the area. A high power fast ebike with a charged battery is a perfect getaway vehicle innit. My favourite fast ebike video is this one Flying !! Best bit starts at 9m30s. |
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Post by phil70 on Dec 26, 2019 21:13:30 GMT
That is one wicked video. 😊🤗😊
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Post by Mr Stabby on Dec 26, 2019 21:30:09 GMT
Apparently, tough new punishments have been introduced for anyone caught stealing Lithium Phosphate batteries.
A LiFe sentence.
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Post by Jim on Dec 27, 2019 9:18:35 GMT
I've just been looking at these too. E bike kit. They aren't illegal, they can be de regulated through the control panel with a code so they will go at 30mph where it isn't illegal to do so. Pushing £800 for a full spec one with regen braking.
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Post by Jim on Dec 27, 2019 9:35:15 GMT
I'm guessing kris is thinking of putting a 1000w+ hub motor kit on a mountain bike. Illegal but very effective, specially effective at getting away from the rozzers if they suddenly appear in the area. A high power fast ebike with a charged battery is a perfect getaway vehicle innit. My favourite fast ebike video is this one Flying !! Best bit starts at 9m30s. I do hope he triggered the speed camera. |
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Post by kris on Dec 27, 2019 12:10:43 GMT
Basically i am thinking of putting a 350w 36v motor on my ex post office bike. But ive found a 30ah 36v lifepo4 battery for not much money, the bike will be a trailer bike so a bigger battery should improve the range when not towing a trailer and help pulling a load with the trailer. But the only chargers i can find are 1-2 amp which would take for ever to charge it and as magnet man points out not sustainable or economical on a generator in winter. So would be looking for a 36v charger of 10-20 amps, i have two 12v ones which are 60amp but i cant find a 36v one of reasonable amperage.
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Post by Deleted on Dec 27, 2019 12:29:06 GMT
How about one of these kriswww.hobbyrc.co.uk/isdt-t8-1000w-dc-charger£85. Supports LiFe battery chemistry but might be only up to 8s which is 30v. Specs are not that clear. It is DC input so I guess you would charge indirectly from generator via your existing Lead Acid battery bank. Run Genny with the big 12v charger. That might work ----- Input Voltage: DC 12-42V - Output Voltage: 0-37V - Charge Current: 0.1-30.0A - Discharge Current: 0.1-5.0A - Max Charge Capacity: 1000W - Max Discharge Capacity: 20W - Balancing Current: 2.2A/cell - Balance Cells: 2-8S - Supported Batt. Type: LiFe/Lilon/LiPo/LiHv (1-8S), NiMH/Cd(1-16S), Pb(1-12S) - Display: 2.4” 320×240 IPS LCD - Operating Temperature: 0-40°C - Storage Temperature: -20-60°C - Dimensions: 100x120x58 mm - Weight: 296g ----- Only thing is a 36v is a 10s pack and this charger seems to only balance up to 8s. But then does the LifePO4 battery have balance leads? |
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Post by kris on Dec 27, 2019 12:35:15 GMT
How about one of these kris www.hobbyrc.co.uk/isdt-t8-1000w-dc-charger£85. Supports LiFe battery chemistry up to 37v. It is DC input so I guess you would charge indirectly from generator via your existing Lead Acid battery bank. Run Genny with the big 12v charger. That might work ----- Input Voltage: DC 12-42V - Output Voltage: 0-37V - Charge Current: 0.1-30.0A - Discharge Current: 0.1-5.0A - Max Charge Capacity: 1000W - Max Discharge Capacity: 20W - Balancing Current: 2.2A/cell - Balance Cells: 2-8S - Supported Batt. Type: LiFe/Lilon/LiPo/LiHv (1-8S), NiMH/Cd(1-16S), Pb(1-12S) - Display: 2.4” 320×240 IPS LCD - Operating Temperature: 0-40°C - Storage Temperature: -20-60°C - Dimensions: 100x120x58 mm - Weight: 296g -----+ Thats the sort of thing okay, but does it support lifepo4 ? |
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Post by Deleted on Dec 27, 2019 12:36:17 GMT
That is a good question.
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Post by kris on Dec 27, 2019 12:38:48 GMT
I would have thought they would put it in the bumf if it did. |
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Post by Deleted on Dec 27, 2019 12:41:02 GMT
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