[Guy Atkinson]

Does anyone know if it is possible to buy a sensibly priced replacement battery pack for my C zero?

 

[Scrooge]

Does anyone know if it is possible to buy a sensibly priced replacement battery pack for my C zero?

Hello!

There are few of us, triplet owners, on here.

But to answer your question I have no idea.

What's so wrong it needs a complete replacement?

There are many on here who have repaired packs.

Longshot, Is there any warranty in place?

Cheers!

 

[richi]

A traction battery with poor reported health and low range, is likely just caused by one or two bad cell(s) out of 88 (80 for later PSA models). There are specialists who can diagnose and replace individual cells or modules. Much cheaper than a wholesale replacement.

 

[freddym]

A traction battery with poor reported health and low range, is likely just caused by one or two bad cell(s) out of 88 (80 for later PSA models). There are specialists who can diagnose and replace individual cells or modules. Much cheaper than a wholesale replacement.

DBMandrake on this forum pulled the battery pack on his Ion and re

 

[freddym]

DBMandrake on this forum pulled the battery pack on his Ion and re

replaced the weakest cells, quite disappointing improvement but best to hear it directly from him.

 

[jonnobris]

Would be worth dropping Cleevely Electric Vehicles | Electrical Vehicles | Gloucestershire a line to see if they could help?

 

[G.a.r.y]

As above what has prompted the question? Issue with the car or just reduced range over time? Replacement packs are very expensive however replacing failed cells to bring a dead/dying car back to live is very much possible. Cheers

 

[Alex Haldane]

Bmw i3 cells are pretty much the same size as the lev50 cells, just need to work out if they are compatible with the mitsu bms and a way of bolting the electrical connections (i3s have laser welded bus bars).

Sent from my SM-G975F using Tapatalk

 

[richi]

Bmw i3 cells are pretty much the same size as the lev50 cells, just need to work out if they are compatible

I think the SuziAuto experience is: no. The cell chemistry is different, so the Voltage curves don't match, causing the BMU/EV-ECU to turtle prematurely.

 

[freddym]

I think the SuziAuto experience is: no. The cell chemistry is different, so the Voltage curves don't match, causing the BMU/EV-ECU to turtle prematurely.

Details on AEVA forum.

Basically the GSYUASA cell chemistry hence voltage/capacity curves can't really be matched by anything else on the market.

Solution would be to change the locked firmware in the cell monitoring boards/ BMS or to reengineer the BMS which happens to be totally integrated into the cars MCU, EVECU, ABS/ESP etc etc

 

[richi]

Well the CMUs are basically slaves to the BMU, which is where the BMS logic lives. The best plan seems to me to be to create some man-in-the-middle CANbus fakery that translates the cell Voltages from the CMUs into something the BMU will like. Similar to what Emile Nijssen had to do for his Leaf extender—now being sold under the Muxan brand.

 

[freddym]

Well the CMUs are basically slaves to the BMU, which is where the BMS logic lives. The best plan seems to me to be to create some man-in-the-middle CANbus fakery that translates the cell Voltages from the CMUs into something the BMU will like. Similar to what Emile Nijssen had to do for his Leaf extender—now being sold under the Muxan brand.

Like a lookup table, three dimensional to account for temperature and load, with interpolation.

 

[richi]

I guess you could, or develop a simpler transfer function. Think gamma, rather than LUT.

 

[JohnMars]

Thank god I did not buy a c-zero 12 months ago! I was literally at the point where it was about to be shipped from Scotland!

I feel that the current sk6 high prices are far too steep for this car, I wonder if anyone is able to shift them, if they do those poor buyers will be disappointed in their ev in a few months.

 

[richi]

Huh? The prices reflect what people are willing to pay for them. Frankly, they're a much better bet than a Nissan Leaf of the same age (albeit more basic).

 

[JohnMars]

Huh? The prices reflect what people are willing to pay for them. Frankly, they're a much better bet than a Nissan Leaf of the same age (albeit more basic).

Only as the cots seem high on auto trader.

 

[richi]

Prices reflect what people are willing to pay.