JimBob
Well-Known Member
- First Name
- James
- Joined
- Jan 26, 2021
- Threads
- 70
- Messages
- 896
- Reaction score
- 1,033
- Location
- Toronto Canada
- Vehicles
- Taycan 4S
Some more information.
Not all manufactures disclose the size of their buffers and not how much is at the high end or low end. Tesla uses a smaller buffer of around 4% and Porsche a larger buffer. Depends on the confidence the manufacturer has in their batteries and their risk of getting it wrong.
Lithium Ion cells, depending on chemistry can charge to about 4.2v +/- depending on chemistry. How you string them together in series and parallel will give you the 400v/900v architectures.
But you are restricted from charging to that voltage by the software, your SOC just says 100%. What that number is, is unknown. You are also restricted from discharging below a lower voltage level to prevent bricking the car. What that number is, is also unknown.
One additional point, is that Taycan batteries are made by LG Chem, of Chevy bolt fame. I used to think that with experience Porsche might some day expand the useable battery capacity as Tesla did. But not likely to happen.
Not all manufactures disclose the size of their buffers and not how much is at the high end or low end. Tesla uses a smaller buffer of around 4% and Porsche a larger buffer. Depends on the confidence the manufacturer has in their batteries and their risk of getting it wrong.
Lithium Ion cells, depending on chemistry can charge to about 4.2v +/- depending on chemistry. How you string them together in series and parallel will give you the 400v/900v architectures.
But you are restricted from charging to that voltage by the software, your SOC just says 100%. What that number is, is unknown. You are also restricted from discharging below a lower voltage level to prevent bricking the car. What that number is, is also unknown.
One additional point, is that Taycan batteries are made by LG Chem, of Chevy bolt fame. I used to think that with experience Porsche might some day expand the useable battery capacity as Tesla did. But not likely to happen.
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