So, I decided to build an ebike. While I wait for other parts to arrive, here are my current plans.
I have two Lipo batteries which I plan on wiring in series to make a 48v battery. They are Multistar 16000mah 6s Lithium Polymer packs.
Interestingly, when you buy such large quantities of lithium packs here in the UK, the packaging comes with it's own materials identifier label, you also get a phone call from customer services to ask you about your delivery which is interesting. I have never had that before. Always have a cup of tea close by
I plan to mount these two lipo packs to a bike frame, close to the drinks bottle mount positions. I have some super-strong PETG filament to print and design some kind of mount clamp support thing, i'm sure it will be suitable
I chose to use these packs over Li-ion packs for a number of reasons. The price is low as they are currently on offer, I already have fast charging for these packs (I have Turnigy Reaktor 300w charging), I have trust in the specification of these packs - I am still unsure about buying 18650 cells from the internet and trusting their reliability. I have cut open many 18650 cells in the past and have noticed so many counterfeit cells - they are usually containing much smaller lithium cells inside and filled with a white powder to fill the tubing. Here's a video showing the white powder inside, some more links here here and here. I must note that I have some good 18650 cells from Panasonic, they are 3400mah panasonic ncr18650b cells which I use in my torches, they are wonderful, the real-deal but costly. Once you experience fake 18650 cells you are hurt. Why do they do this? It looks like a lot of work to make those fake cells, I wonder who's doing it?
I also like the capacity to price of these packs. 16ah capacity. The most common Li-ion packs appear to be around 8-11ah and their cost is ranging from £200-£600 (or £400-£1000 after all this post Brexit shit completes its so called meltdown :) lol fear!!! Be afraid!!! hahaha
I know that the Li-ion cells have a greater number of charge cycles (over 2000+ supposedly), the Lipo packs are rated at 500 charge cycles. In real-world, this is more subjective based on full-charge or part-charging, discharge rates etc. For the price, I am happy to use lipo. I am not interested in spot-welding my own 18650 Li-ion pack or making a BMS wiring system for them, I like the simplicity of these 6s packs to use with my charging station
I also have some nice XT90 connectors to link the packs
I have two Lipo batteries which I plan on wiring in series to make a 48v battery. They are Multistar 16000mah 6s Lithium Polymer packs.
These packs weigh 1.978kg each, their dimensions are: 18cm x 7.5cm x 7.3cm which is about the same volume as a bike drink bottle.
I plan to mount these two lipo packs to a bike frame, close to the drinks bottle mount positions. I have some super-strong PETG filament to print and design some kind of mount clamp support thing, i'm sure it will be suitable
I chose to use these packs over Li-ion packs for a number of reasons. The price is low as they are currently on offer, I already have fast charging for these packs (I have Turnigy Reaktor 300w charging), I have trust in the specification of these packs - I am still unsure about buying 18650 cells from the internet and trusting their reliability. I have cut open many 18650 cells in the past and have noticed so many counterfeit cells - they are usually containing much smaller lithium cells inside and filled with a white powder to fill the tubing. Here's a video showing the white powder inside, some more links here here and here. I must note that I have some good 18650 cells from Panasonic, they are 3400mah panasonic ncr18650b cells which I use in my torches, they are wonderful, the real-deal but costly. Once you experience fake 18650 cells you are hurt. Why do they do this? It looks like a lot of work to make those fake cells, I wonder who's doing it?
I also like the capacity to price of these packs. 16ah capacity. The most common Li-ion packs appear to be around 8-11ah and their cost is ranging from £200-£600 (or £400-£1000 after all this post Brexit shit completes its so called meltdown :) lol fear!!! Be afraid!!! hahaha
I know that the Li-ion cells have a greater number of charge cycles (over 2000+ supposedly), the Lipo packs are rated at 500 charge cycles. In real-world, this is more subjective based on full-charge or part-charging, discharge rates etc. For the price, I am happy to use lipo. I am not interested in spot-welding my own 18650 Li-ion pack or making a BMS wiring system for them, I like the simplicity of these 6s packs to use with my charging station
I also have some nice XT90 connectors to link the packs
The size as you can see is quite larger than XT60 connectors. I also have 10AWG wire to solder the harness adapter.
The bike I am using for this experiment, I pulled from a skip. It is a Carrera mountain bike which I will modify, the frame is good, the wheels are fine. So the bike was free. Free is good.
So while I wait for the motor to arrive here are some more photos of the lipo packs. I will update more on the build soon, it should be a fast build.
2 comments:
Looks like an awesome project. Would you consider sharing the battery mount models on GitHub or the likes? I've already got a Dolphin pack with 18650 cells, but I'm following with interest!
It will be considered :)
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