Search results

Thanks for the info. This problem was also related to the issue of opening the SuC network for other car manufacturers, where I considered that the voltage limit of 410V for SuC V2 is the main technical reason and was waiting for the V3, which has 500V support from the beginning. However, Tesla...

Hi small question, the new Plaid pack seems to have internal cell connection of 108s (110s) which leads to a maximal charging voltage of around 460V. I assume that there is no problem with charging on the SuC V2, which according to the label has an output range of only 50-410V? Thx.

The nominal voltage of battery is 350 V (96s = the same as in Model S/X) and this gives 3.65 V nominal cell voltage. So the nominal cell capacity is then equal to 5000 mAh.

That difference means only that there is measured energy of the both charging and discharging process by the BMS. For example if you have a single 12.6 Wh cell, you must always supply 12.8-13 Wh (depends on charging rate) of energy for its full charge. Only then you are able to discharge the...

I absolutelly agree with Bipo. In EU there are much more than 5 times more AC public stations than fast DC stations and most of them are 3x32A (22 kW) with mennekes sockets. So the new 3x24A (16,5 kW) charger is definitely a downgrade for the most EU countries. On the other hand I am not sure...

It would be great if you can find this data for 60kWh pack: :smile:

By the way, it would be interesting to find out how long after that the DC-DC converter will run. Because ~240W is not negligible power drain from the main battery.

It seems to me, that you just confirmed everything what was stated in the first Wk post in this thread. :rolleyes: Your car total batery capacity is 81,6kWh = so your cells are ~11,48Wh/3200mAh (It fits with specification of NCR18650BE cells). Your car total usable capacity is 77,6kWh (4 kWh...

If there are cells similar to NCR18650GA in the 90kWh pack, then the asterisk is also necessary, but it would not be so big as with the 85kWh one. :rolleyes: Under the nominal conditions from datasheet: 0,5C charge / 0,2C discharge I have achieved best result (four cell samples) of 3385mAh and...

Ok we are now looking on the same graph. :smile: You need to read the voltage axis! Okashira in this particular test discharged the cell to 0V, but the nominal capacity for the most NCA cells is measured to 2,5V and you lose the manufacturer warranty if you discharge the cell below this value...

Maybe we both read different graphs, but till now I just did not seen any graph where the Tesla cell discharge significantly more than 3100mAh. And if I look on discharge voltage curves I don't see more than 3.6V nominal voltage, so these cells are 11.16Wh at best - exactly as described Wk and...

If they are close to NCR18650BE with 3200mAh rated capacity they can't be 11.9Wh. The only cells which are rated as ~12Wh at 3200mAh are LG or Samsung LCO cells with 4,35V charging voltage and 3,75V nominal voltage (I have tested them). But for NCA chemistry you need at least 3300mAh nominal...

At first I must say great thank you to wk057 for doing this tests and presenting results. But this discussion starts to be strange. So again I ask the fundamental question: Till now I don`t have lucky to get some Tesla cells for my own tests, but from my experiences with many other industrial...

There are two main reasons for choosing 18650 format cells for space limited apps. 1) 18650 format have the best energy density (both volumetric and gravimetric) than any other format/size over the last decade and it seems that this state will continue for next 10 years (Audi predicts that...

So far there was a rule that the 18650 size cells used in Tesla batteries were already commonly available on the market in industrial grade (for laptops, power tools etc.). Even the latest industrial equivalent of Tesla 90 kWh battery cells start its mass production in early spring this year. So...

Yes this is interesting. If you look at volumetric and gravimetric energy density of the best available cylindrical cells you can see, that 12,6Wh 18650 with ~725Wh/l makes a narrow peak. Best smaller 18500 cell size are at ~524Wh/l(Panasonic). The same result you can see with 26650 cell size...

Yes this is one of two fundamental questions in BEV world which I try to find an answer. The second one is why these bigger cells still have significantly lower specific energy than 18650 cell format. The best 18650 is now between 700-730Wh/l but big pouch cells have only 400-450Wh/l with the...

Yes, but implicate two aditional issues. 1) The powertrain of R8 e-tron was designed before the switch to 18650. So it is possible that their cells can do 6C as well. 2) Is there really a demand for 6C high-capacity cells in BEV mass market? The R8 is a supersport and the 4C seems enough for...

I read somewhere, that cells are for Samsung but it seem to be only a guess. My idea of why I am holding this debate is that there is no problem with battery producers. If for example VW switches to 18650, they can have right now state of the art cells even without Panasonic. And yes, you...

I really insist on 4,2V per cell :smile: Supercharging Tesla Model S 85 kWh to 100 % - YouTube Yes you are right, that lowering the tapering voltage will result in great improvement of cycle life, but NCA and LCO chemistry are also very sensitive on top charging voltage value in the term of...

There is no evidence that these cells ever leave a production plant, otherwise we will now get the 95kWh battery.

Yes Panasonic NCA are 3,6V nominal with 4,2V top charging voltage (it is standard top charging voltage for NCA chemistry). Tesla do not limit top charging voltage. You can see pictures from superchargers with ~403-404V which equals to 4,2V per cell. Tesla only limits that you cannot discharge...

Yes, equivalent to Panasonic (NCA) NCR18650A, 11,2Wh (2009) was LG (LCO) ICR18650D1, 11,2Wh (2009), Panasonic (NCA) NCR18650B, 12Wh (2012) was LG (LCO) ICR18650E1, 12Wh (2012), These cells have graphide/carbon anode only ____ Sanyo (NCA+SiO/C) NCR18650GA, 12,6Wh (2015) is LG (NCA+SiO?/C)...

I do not agree only with this statement, because using SiO additives is already well known technique and it is now widely used by major cell producers like Samsung and LG. These producers always had the 18650 equivalents to the Panasonic cells and they already have it even for the new 12,6Wh cells.

I was not, because even in Tesla Motors there are no wizards. They are just use the best technology currently available at the market for their battery packs in the term of driving range of the vehicle. So right now there is just no better technology, than is used in the 90 kWh pack. And Yes...

Yes, you most probably get the entirely new pack (just for the service action time reason) and the old one will Tesla reuse. I think that 3k USD option is valid for the new car only, because right now there is known only statement, that the retrofit will be possible. I think that the price will...

You should consider, that the main reason for releasing the 90kWh battery pack was to equalize drive range of Model X with Model S with standard 85kWh battery. Because the higher driving resistances of Model X (higher air drag, probably more weight). So i think that the Model X will have 90kWh...

I found in the shelf never used Panasonic NCR18650B (industrial grade equivalent to Tesla 12Wh cells). Cell was made in Q3/2013 and I do measurement under the upper mentioned test cycle: (charge: 1,65A to 4,2V with 65mA cut off, 15min rest time, then discharge: 620mA to 2,5V cut off) with...

Thanks wk057 for your cell measurement. I assume that this discharge curve is quite OK. :smile: But I have a few hints or comments (sorry if they are well known for you :rolleyes:) Methodology: Did you use 4-wire (Kelvin) measuring method with your PL8 station? I mean bananas together with...

Exactly, Tesla uses passive cell balancing method based on dissipating balancing current via shunt resistors. In this particular case, we can see four 158 Ohm SMD resistors connected in paralel which gives us 39,5 Ohm total value. We know that Cell chemistry used by Tesla has maximum charging...