We need more places like this. Repair old packs don't just throw them out.

Glad Lithuanians doing well in Norway!

Looking forward to seeing how much SOH will improve after the cell change.

Man I'd be over the moon if in 10 years I find out my EV can get new life breathed into it range-wise for a couple thousand euros.

Nice interview Bjorn, you are improving. You had a good cadence with your subject and had some go to stuff you wanted to cover as a part of it. Well done.

7:00 Passive cooling is what is shown. The heat leaks through the shell. A duct and a fan would be active cooling. If they would have made a air duct, they would have also added a fan. = active air cooling....

This video is way more interesting then him driving around some luxury EV that almost nobody can afford. I am also amazed at how well these guys speak English when it clearly isn’t their mother tongue.

7:05 the passive cooling is the heating up of the whole pack walls and radiating it out :) If you have air channel and something forcing air through - then it's already active. There's also few cm cap between pack and body above, where air passes through. (and a lot of dirt collects over time)

8:30 temperature sensors are also resistors, variable resistors. Their resistance changes with temperature and thats how system knows what the temperature is. Replacing them with standard resistors would "lie" some temperature to BMS. And then you can kill your battery when it's hot. And maybe yourself, if it gets extreme and bursts.

It is good to see that there are people who can keep the aging part of the electric car fleet going. And the fact that it is here in Lier is just fantastic!

Very interesting. I guess it must be expensive to fix but except for the time involved, seem doable. This is the future.

Extremely interesting video. Many thx. I drive a Leaf as well. It’s a 2018 Model with 40 kWh. Would not recommend to take out the temp sensors. W/o you may get hot far beyond 60 deg C during charging o reduce their remaining lifetime quite significantly. In a worst case scenario, the car may start burning. To my knowledge, the BMS uses temperature as well to control the max current. If you do it, I personally would charge the car only with AC as batteries don’t get so hot. I’m a bit surprised about the location of the temperature sensors. They are suboptimal. Would place at least one in the middle of the log stack. Looking forward to your next video, how much you could improve the stack. Goid luck

Just bought a 2015 Leaf in Canada! So exciting to see stuff like this!!

Great video Bjorn. really interesting seeing how the Leaf battery works and the hacks to repair it!🎉🎉

One of your best videos Bjørn. Relevant info.

Nice Video. You should do some rust prevention. I see a lot of rust in the bakck of the car.

Loving these deep dive repair videos thanks Bjorn

Power to your elbow my friend. The more people like you the sioner I can get my 2013 leaf back to full battery power.

I love these tech videos, keep them coming!

This is great electric automotive content. Very informative. Björn has so much unique and good content! Thx!

This is a really helpful video for all people looking for a second hand leaf, thank you for the good work and sharing that professional and wide knowledge. I wish this had came out a year ago, becase I would have saved a lot of time on internet forums, videos and articles. Just to give some extra info, for europe: the leafs before 2013 with light interior had that charger on the trunk and were made in Japan. All those batteries were 24 kWh, but not the most reliable. On 2013 and next models, interior was gray and no charger volume on the trunk. Starting on that year model, cars were made in Sunderland (UK) for european market. Those 24kWh batteries were more reliable than before. Also, heat pump was introduced, but not sure if those were standard or an option. There is a way to know if it's fitted based on the piping on the left area under the hood. Then, 2016 model had some minor changes and an optional 30 kWh battery. Same volume, different cell chemistry and layout. I finally got one of those at a good price. That 30 kWh battery is usually not more robust than the post-2013 24 kWh battery, but there are 2 important points to evaluate: First -> Being a bigger battery, even with lower SOH, more capacity is usually left. Second -> Nissan usually offered an 8 years warranty for battery SOH on those 30 kWh models. So, even a 2016 car would have battery warranty up to 2024. There are some conditions on that warranty, but it's a good backup. For anyone out there looking for one, this is important info. I ran though some scammers on my search, including 2012 models sold as post-2013 and cars from really hot weather areas here in Spain that had suspiciously high SOH, but really low estimated range even in eco mode. I have no proof but also no doubt that those SOH were recently reseted and still not showed real SOH. Also, many people is not aware of these generarion changes and try to sell an older and degradated battery car for a high price. For now, I'm very happy with this really ugly car. It's really more usable than I expected, so even when I had done my math to park the diesel car and use it only on long highway trips while saving money by doing 10-12 K commute km per year, the leaf is already over 20 K last year. It's not a great EV nowadays, but it's OK for its time and the second hand prices.

I like batteries and repairing evs stuff, great video Bjørn

Great interview! Hope you can get some cooling fans for the battery pack! Can't wait to see the results!💥

Best content for the audience to understand what the future of our battery might have to deal with, hopefully these bad cells are identified before the battery is out of warranty. Keeping Elbikmek in my toolset of resource! Good work guys!

Really enjoying these videos thank you

Thanks Bjørn for this very interesting video about battery repair. I am looking forward to your test results after the module has been replaced.

Very Interesting, can't wait for the result

Outstanding video. I hope this works. Please keep us posted on the results.

I would love to see what a fan would do in terms of charging and power. The only problem i could see is that you have to pull cool air in from some place that doesn't allow water in as well.

Very interesting viewing this, thanks Bjørn!

Great synopsis on LEAF and will be very interesting to see where the battery health will settle after the weak cell has been replaced.

If only I could take my leaf somewhere locally and have this done... Love this car. Best $1500 I ever spent! lol

I really like you ask all the interesting DIY stuff like active cooling with fans etc. I would really appreciate if you can make this experiment if you buy this Leaf and go really in depth how to do it. Would be very interesting for me to see the benefit, if any. I would imagine Nissan tried this and for some reason decided not to do it, maybe because the benefit was so small but we will never know unless somebody like you actually does it. Thanks for the great content

You can actually get a gen 2 with light interior but they are rare, check the brake and boot to be sure.

According to this car manufacturers should make battery remove fast and easy also opening pack easy then it would be much cheaper to repair. Not like Tesla is planning to put some foam into packs and making them almost impossible to repair that would affect to insurance bill in future if car is expensive to repair.

Curious for the result, when will it be posted? :)

Great Video, can you do more

I bought in Sweden december 2016new 30 kWh. Been runni ng 138 000km and I 10 bars of SOH today. Kan drive maximum 120km light fort with out heater or AC on summering tyres. The car have benen running perfekt as famely car but start to think what to do in future. Chademo plugg are also to be a negative thing in future. But I am amazed about the quality nissan build in to this car.😊

Do I see a 1000km challenge??

Nice video as always, but the idea of replacing the temperature sensors with a resistor to lie to the BMS, should be criminal. If the battery heats up, and the charge or discharge current keeps going on, can cause it to catch fire or explode. I think it is bad that it was even suggested. There is already a big amount of FUD provided by the anti repair camp, and the idea that some one could make this kind of modification to a pack will scare even more people. Not good if you are pushing for reparability of these units like you are showing here.

Enjoyed it. Interesting.

The cost of the repair is a SEAL, compated to germany. My charger was "broken" and it is soooooo difficult to get it fixed. bjorn is in ev paradise and doesn't recognize it anymore ;-)

Where is the next video related to this? Did I miss it? Thank you for this kind of content, really appreciate it.

It’s always the time of the garage/shop, plus the skill and the time of the technician/mechanic.

Now these are interesting videos!!!

Looking forward to following this project, to see this vehicle become almost like new again. Please detail it😁🙏 looked like one of the last cells also was pretty bad. Why not change that one as well?

Good video! Hope you do something similar with an Opel Ampera / Chevy Volt.

Try doing that on the Tesla model Y structural pack!

I wish such workplaces would be common in Germany. Here if you have trouble with an EV, only very few can help.

this is very interesting i like repair videos!

Really interesting

If the car is in good shape You might aswell just replace the battery pack to the 30kwh one

12:00 1000 euros for module replacement, oh my, but it is of course a lot of work. It is a lot less work to put in a whole new 30kwh battery. For maybe around 5000 euros, and sell old for battery storage for ~2000 eur.

I always wondered whether just removing the cell and bridging it instead would be viable. You'd essentially get slightly lower overall pack voltage and also proportionally less capacity, but such intervention could make sense in cases where sourcing replacement cells would be difficult. If the BMS could be made to go along with it, that is.

Hope it goes well 🙏

Most excellent video, what a star, keeping those old Leafs on the road….be interesting to see if the car could take the newer battery pack, are they the same shape ? Will the onboard electronics cope with a newer pack or will it need to have the newer charging and BMS package too ?. So many questions !

It'll be interesting to see how much additional capacity you get, that bad pack will have been cushioning the other 47 packs because the BMS will have been calibrating to the worst pack.

Great video but I would have waited for the final result before publishing 😁

repair once and in a few years you can use it for home solar storage and put a bigger lfp inside

AMAZING

Inside the car, you can see if the car has A og B-battery: Look under the cover in front of the back seat, to see the size of the switch.

Good business. They can only expand even further by doing EV conversions!

Can’t believe almost nobody offers this service in the US… my 2013 Leaf only has 2 bars of degradation, would love to replace the pack when SOH gets to 50%

That would be intresting to see, active cooling with fans, in the Leaf. Maby some, comparsion afterwards, to see if it worth it or not. Mhm, but after, rethinking, the Leaf is after all a daily driver, so i guess its not worth it. Only for the Science then....

If you could add something to get the air moving inside the pack, even without ventilation hole that would be able to transport the heat to the outer shell of the pack more efficiently. A non-conductive liquid sloshing around, or a high density and heat capacity gas might even work. Should not take much.

The battery on an e-nv200 has an air cooler but pack size is bigger.

Maybe fix the rust under the battery, and on the battery box!

Was that a Th!nk City at 18:17? I wrote to them back in 2000 to ask them if I could get involved with their company. They sent me a brochure, and a letter saying they wouldn't be coming to Canada. Still have them.

Very interesting.

The problem with weak cells in series is that the weak cell will be reversed charged by the current flow of the good cells. I have seen this during aircraft nicad battery service. The battery than was discharged and cells individually discharged. Sometimes that fixed the problem. Many times a cell would short during capacity check or recharge. It would burn damaging other cells. There was a lot of gas and the service area was purged for several hours. The lithium cells are much more dangerous. Try and get as much technical information as possible.

so interesting!

If only we could get 500k of this man in the US that’s what would really bring EVs to the masses.

Hi Bjorn, maybe it would be enough to actively cool the badly placed batteries in the middle by simply welding some "peltier elements" (not sure if it is called that way in englisch as in german) directly under these places. that would work without removing the battery. 12v units exists, and should be easy to retrofit. maybe add some cooling fins as well. and if you cool down the hotspots, the rest should be fine, right?

Very cool vid. Where to start? With the CityEL parked casually in the garage, or just some Think? With the joyful promise of regaining quite some SoH? The knowledge about dismantling LEAFs? And not to forget the serial number of the battery pack ending with 140 which implies that this could very well be a very early one? Just buy it. This LEAF is the one to open a box, most likely not Pandora's but with cookies that are good for us and the car. Interesting as well is that there are more companies that make slightly worn out LEAFs better. For example Muxsan in The Netherlands. They do complete battery replacements, upgrades, downgrades (if ever), battery extendeders placed in the boot, 11 kW type 2 charge ports, even CCS upgrades. Might be cool to visit them with this car. There is a ferry from Kristiansand to Cuxhaven, which saves you lots of effort and lots of fast charging.

❤❤❤

whens the next part of this coming out?

It´s worth to convert the chademo plug into a CCS plug in order to have a better coverage of charging infrastructure?

I have one cell , cell #1 in fact that falls before the rest. I dont think its that bad yet as I have a 2023 but under 30% SOC its the cell that is 50mv below the top and drops further under acceleration.

Have you tried the Old Danish Ellert next top the Leaf ?

Only fans, no switch

Bjørn could it have been the BMS cos even after the cell was swapped out it did the same to the new cell. That's how you found out it was a faulty BMS. Just a thought.

Cliffhanger! lol

Great video. Where, physically, in the pack was the faulty cell?

Is There a Part 2 following this repair ?

big challenge is cost. most of which is labor. replacing one or two cell modules may be cost prohibited when factoring in the price market of the car. reselling battery, motor, and other parts to used market may be more attractive than actually having to 'fix' your car by a shop like this. the other option is DIY; then labor is your own. this might be interesting; one caveat though is not getting electrocuted or securing equipment for getting in and out the battery ....o_0

@bjørn: how much is the car + repairs=total cost?

Part 2??

EVs Enhanced New Zealand The manufacture of liquid cold repacement battery pack for Nissan Leaf.

what kind of diagnostic you use ?

1000km challenge?

How you connected the autel

I'd be interested in knowing where Valdemaras and his fellow mechanics learned how to service EVs (and not get electrocuted).

How long to remove battery pack ?

What's the status for the follow up?

That chart had blue and red lines. I am wondering what that means.

Hey Bjørn, are all module in serial or parallel? Would it be possible for a smart BMS to isolate bad module the same way a HDD/SDD isolate bad sector ? I have no idea if Nissan or Tesla or anyone is doing that and if it's possible, but loosing 1/48 Modules seems a much better deal than what is currently lost in this Leaf.

AS you were already taking the battery pack out why didn't you look at upgrading the pack to a later bigger pack?

are they now going solid state batteries?

This should be compulsory watching for all the EV skepticals out there. A 10 years old battery can be given a new lease on life just by swapping out one module. The EU just walked back on its 2035 no-ICE mandate, which is crazy. In the meanwhile, Norway leads the EV race.

There is a US EV Brand where this fix would not have been possible.