I was one of the original backers, but I opted to wait for the larger battery to be developed.
Does anyone have any information about when it will be available?
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Many people seem to be interested in a larger battery so we already worked on this but Iād like some feedback about our choices to see if we are going in the right direction.
- we will use 21700 cells
- the capacity: should we go more to 800Wh or to 1000Wh ?
- voltages: 36V, 48V, 52V are the version we envision
- should it be longer or higher ? Making a 1000Wh version with the same height will add 9cm
of course all the adaptors (handle, generic/bosch/ā¦ discharge connector will be the same)
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The 800Wh would contain 40 cells and the 1000Wh 50? I would prefer the 800Wh version as otherwise the battery will be too big and heavy.
Do you have estimates of the masses of the 800Wh & the 1000Wh ?
I have a large number of used 18650s on my balcony. They sadly only have 1Ah each. Was hoping for a 13S6P or 13S7P version with 18650s so that I can use them.
Personally I would prefer the 1000 wh battery. I will happily trade a little added weight for increasing the range. The only reason I would vote for the 800 wh battery would be if increasing to 1000 wh would make the battery incompatible with my Radster Road e bike
By the way, after doing a little research, I found that the approximate weight of one of the the 21700 sells is between 60 and 70 grams. So adding 10 cells would add approximately 700 grams to the mass of the battery. If Iām that concerned about weight, Iāll just go on a diet and lose a little bit of weight out of my belly.
In my opinion, 800 wh is a wiser choice for two reasons :
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the european market is dominated by electric bikes that cannot exceed 25km/h, and in average a 800 wh battery can already last several hours at this speed. So for 99% trips it is more than enough. If one day I absolutely need to ride 7 hours I can always take a long lunchtime break and charge with a fast charger.
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1000 wh is higher that what most battery suppliers propose, yet your main selling point is that your product is repairable and eco-friendly. Fighting for the biggest battery is not coherent with reducing lithium cell waste.
I have two questions about what you wrote
First is that you said that 800wh will provide āseveral" hours. But I am not sure what āseveral" means. Could you be more specific?
Next, you alluded to wanting to use less titanium for environmental reasons. I would have assumed that with more cells the cell life would increase and therefore counter the worry about using more titanium. Am I mistaken about that?
Yes sure. Below two calculus methods.
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Based on my personal experience : I own a 750wh bosch battery which I use on a 30kg bike. I weight 70kg. I have a slightly uphill ride to go to work . The return journey takes me 15% of the battery for 50 minutes drive. So, with similar conditions, going from 100% to 10% would last 6 x 50 = 300 minutes which means 5 hours.
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Based on an autonomy simulator for a 800wh battery : eBike range calculator for Bosch drive systems . Even if we select assistance mode eMTB (3/4), with a hilly terrain, with maximum speed (25km/h), we get 94km autonomy which would last almost 4 hours at this speed.
About your second point : I also use the word āwasteā when I believe resources are not properly allocated. For instance, assuming our lithium stock is limited, and we can decide between building 200 ebike batteries (500wh) or one big tesla battery (100 Kwh - for the richest of us ^^), I believe that most of us would consider that the second allocation is a terrible āwaste of ressourcesā. So my point is : if we consider that 800wh is enough, why reducing the number of available batteries by 25% just to get a bit more of (useless) autonomy per consummer ?
hello,
yes we are working on a bigger battery that should be available begining of next year. It would be with 21700 cells and existing in 3 configurations: 36v, 48V and 52V from 900Wh to 1000Wh.
tell me what you think
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Thank you very much for your detailed answer. Unfortunately, my understanding of electricity and electronics leaves me a little bit confused. Nowhere in the first part of your answer does the distance traveled seem to be addressed. Perhaps it is more important to think about the time the battery is used rather than the distance, but I usually think in terms of distance traveled.
Am I incorrect in wanting to think in terms of distance rather than in terms of time? Please excuse my ignorance on this subject.
Iām sure youāll agree that maximum riding time matters as well. For instance a 100km autonomy on a 25km/h e-bike is considered to be comfortable, whereas a 100km autonomy on a 100km/h e-motorcycle is viewed as rather limited. The reason is simple, I need to charge this e-motorcycle every hour, whereas I can ride my e-bike at full speed for four hours. So I guess the only thing Iām saying is : if I own a 25km/h ebike, I donāt need a battery that would last longer than the time I am actually willing to ride per day anyway.
My Radster Road ebike came with a 48v 720wH 15aH battery. After doing a little research, it seems that it would be best to try to match the voltage.
So I am wondering if I purchase a large Infinite battery that is 48v, will there be options for the watt hours or will all 48v batteries have the same energy capacity?
Thank you again for your reply
My daily commute is often 50 km in each direction
begining of next year
My 1000wh 48V battery just died, and I would love to replace it with an Infinite Battery. Can you elaborate what ābeginning of next yearā means more concretely or is it too early?
Perhaps you can offer a trade-in program, so I can get the 500wh version now and upgrade later when its available?
I have lots of old 18650 cells so I would really like to have a battery case in which I can put a large number of 18650s.
Is there any possibility that there will be for example something like a 13S7p 18650 based cargo battery in the future?
I am still waiting and hoping to hear about the larger battery and when it will be available
Iām 75 years old and I donāt have infinite time to wait for an infinite battery
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Bigger is always better as she said! The weight saving for smaller batteries are only relevant if you are an elite e-mtb rider. With bigger battery the cells last longer because you do not deplete then so much and can stay within the optimal charge rate. 20-80% instead.
Also following the larger cargo battery - i hope it will be available as a kit without cells as the 90eur shipping is a lot! and VAT will probably get added on top of that.
Hey Alex, Iām brand-new here, but personally Iād love to see a kit that hit that āgreater thanā 800+WH ceiling. With (21700ās) 50E, 58E, and (soon) 60Q cells from Samsung, these would give considerable advantage over ANYTHING āstockā from mfgās out there today! 36V is what I think is slightly more common, but 48V versioning shouldnāt be āslept onā i.m.p.o. Regarding your form-factor, can you offer both, at least in the first run, and see which is more popular? Personally, Iād like higher, that way it might retain the āslot inā characteristics many ebikes all ready provision for.