Any details on the battery?

[MJSfoto1956]

Do we have any details on the battery specifications? 
e.g. Nominal voltage. Chemistry. Source/Brand. Cell Format. Amp hours. C rating. Total Watt hours, etc.

Thanks
M

[jimball]

Do we have any details on the battery specifications? 
e.g. Nominal voltage. Chemistry. Source/Brand. Cell Format. Amp hours. C rating. Total Watt hours, etc.

Thanks
M

Arcimoto specs:  12 or 20 Kwh Li-Ion battery pack.  The technology is common with current design electric/hybrid vehicles.  Nothing new or radical.  I have not seen any of the other details you ask about in any of their publicly released information.

[MJSfoto1956]

Arcimoto specs:  12 or 20 Kwh Li-Ion battery pack.  The technology is common with current design electric/hybrid vehicles.  Nothing new or radical.  I have not seen any of the other details you ask about in any of their publicly released information.

Knowing that 12000Wh = xAmpHours * yVolts then we can "guess" at the following:

• 72V * 166Ah
  
• 84V * 143Ah
  
• 96V * 125Ah
  
• 108V * 111Ah
  
• 120V * 100Ah
  

Of the five options listed above, I would "guess" that their battery is likely around 108V or thereabouts.
For example, Zero uses 28s 3.65V Li-ion pouch cells for 102V. 

If Arcimoto uses a similar design, then their 12kWh pack would be 102V * 117Ah, but that doesn't tell us how many strings they are running in parallel. Much of it depends on the Ah of each pouch. To complicate things, given that the FUV has much more room for batteries than a Zero motorcycle, perhaps Arcimoto is using LiFePo4 chemistry instead in which case they might be planning on using 32s 3.2V pouch cells to deliver 102V. 

I guess we'll eventually find out, but it would be insightful to get a sense of where their technology is, especially for those considering putting down a deposit.

Michael

[Dan21]

Knowing that 12000Wh = xAmpHours * yVolts then we can "guess" at the following:

• 72V * 166Ah
  
• 84V * 143Ah
  
• 96V * 125Ah
  
• 108V * 111Ah
  
• 120V * 100Ah
  

Of the five options listed above, I would "guess" that their battery is likely around 108V or thereabouts.
For example, Zero uses 28s 3.65V Li-ion pouch cells for 102V. 

If Arcimoto uses a similar design, then their 12kWh pack would be 102V * 117Ah, but that doesn't tell us how many strings they are running in parallel. Much of it depends on the Ah of each pouch. To complicate things, given that the FUV has much more room for batteries than a Zero motorcycle, perhaps Arcimoto is using LiFePo4 chemistry instead in which case they might be planning on using 32s 3.2V pouch cells to deliver 102V. 

I guess we'll eventually find out, but it would be insightful to get a sense of where their technology is, especially for those considering putting down a deposit.

Michael

According to PAX in his reply on 9-8-2018:
"Right now our SS FUV  is set for us to only get 60% of the batteries capacity. from 20 to 80% This does cut the range down. 

I am not sure what % of means, voltage wise. Can some one tell me how percentage of charge relates to battery voltage. With a 3.7 nominal cell (4.2 Max) what voltage is 90%, 80%, 20%?

These are Farasis cells, made in China and are suppose to be a high tech design that handles heat better. They are air cooled. AM is assembling the modules at the moment which is labor intensive."

Here's a separate article that says Zero uses Farasis batteries:
https://newatlas.com/zero-electric-motor...015/35865/

[MJSfoto1956]

According to PAX in his reply on 9-8-2018:
"Right now our SS FUV  is set for us to only get 60% of the batteries capacity. from 20 to 80% This does cut the range down. 

I am not sure what % of means, voltage wise. Can some one tell me how percentage of charge relates to battery voltage. With a 3.7 nominal cell (4.2 Max) what voltage is 90%, 80%, 20%?

These are Farasis cells, made in China and are suppose to be a high tech design that handles heat better. They are air cooled. AM is assembling the modules at the moment which is labor intensive."

20% is a "typical" lower discharge limit for lithium (compared to lead acid which is 50%). Likewise, 4.2V would be 100% charge. And 3.6V is nominal (or "average"). So perhaps limiting the max charge to 4.1V is what they are talking about. Some consider this a best practice with regards to lithium battery longevity. If so, then Arcimoto is being very conservative with their specs. OTOH, this also suggests their battery packs store many more Amp hours than a typical eMotorcycle. They can do this because they have much more room to work with.

[Kepesk]

Also the batteries are suspended in goo to assist with cooling. Goo is the technical term. ?

[MJSfoto1956]

Also the batteries are suspended in goo to assist with cooling.  Goo is the technical term.  ?

Perhaps they are using the "Outlast LHS" goo. Not cheap. But there are other less-expensive options out there as well.

Michael

[MJSfoto1956]

On thinking upon this a bit more, there are six likely scenarios assuming they are using pouch cells to make their 12kWh/20kWh Li-ion packs:

102V packs:

• 28s3p/28s5p = 39.1Ah pouch cells
  
• 28s6p/28s10p = 19.6Ah pouch cells
  
• 28s9p/28s15p = 13.0Ah pouch cells
  

110V packs:

• 30s3p/30s5p = 36.5Ah pouch cells
  
• 30s6p/30s10p = 18.3Ah pouch cells
  
• 30s9p/30s15p = 12.2Ah pouch cells
  

FWIW, AUDI uses 37Ah pouch cells in their PZEV, so nothing out of the ordinary here.

Michael