Nissan Leaf SOH and Hx vs reality, 82% SOH and useless battery
Vložit
- čas přidán 20. 08. 2024
- This is a raw footage of a 2019 Nissan Leaf test drive. It is meant to educate all possible buyers to evaluate what battery data really mean. Many people think, that the SOH number directly represents how much range is still left in the battery, but reality is different. I'm not exactly shure how the Hx is calculated by the BMS (sorry, LBC), but this number seems to represent the inverse of it's internal resistance, perhaps the percentage of power it can still delivef. I wil open a discusion on www.mynissanleaf.com so please check in and add your perspective. Thanks for watching.
![[Летопись про Leaf] Деградация батареи 24кВтч и 30кВтч. Как бороться с падением SOH?](http://i.ytimg.com/vi/y9cJf9jDBJA/mqdefault.jpg)
![[Летопись про Leaf] Деградация батареи 24кВтч и 30кВтч. Как бороться с падением SOH?](/img/tr.png)
Leafspy SoC 40.8%, car 0%, 676mV imbalance. Do not use Leafspy SoC to drive with in any leaf
But very good demonstration about how misleading SoH is in any leaf pack except the original 24KWh
My rule of thumb, if Hx is 10% (or more) lower than SoH, the battery is no good
The higher cell charge voltage of ZE1 pushes NMC to the limit and is a big contributor to the problem
Wow, nearly 1000 high power QT (DCFC) charges. Thats going to affect battery life especially if they were performed during elevated temperatures.
That was the main reason for degradation. Also the fact, that temperature sensors are on wrong locations- They are on bus bars, way too far from the real heat.
Hx= conductance which is inversely proportional to resistance. Meaning that the internal resistance of the overall pack at 4x % is 2x+way out of spec and increases exponentially with load. Hence voltage sag. As someone said it’s cells in the big stack so potentially they could be replaced with ones similar in capacity to rest of pack. And perhaps the worst effected in the smaller “v”.😊
Hx= conductance which is inversely proportional to resistance. Meaning that the internal resistance of the overall pack at 4x % is 2x+way out of spec and increases exponentially with load. Hence voltage sag. As someone said it’s cells in the big stack so potentially they could be replaced with ones similar in capacity to rest of pack. And perhaps the worst effected in the smaller “v”.
First video I've seen on YT that takes Hx into account.
And the fact, that it is even more important then the SOH. In fact, it should be the part of SOH.
what is Hx?
@@AlmightyPyro internal resistance
@@decimal1815 what should the hx be? i have it at (101.33% and soh at 100.00%) got a new battery so i want to maintain it well atleast this time
Did you end up getting a new battery? wish i had seen this video before buying the 40khw leaf i should have gone with the MG4
I replaced the cells. You should bettery buy MG, if you ask me. They seem to be decent cars.
This is exactly what the 2020 SV plus leaf I just bought does. Only got 75 miles of range… battery went from 68% to 32% after getting back onto the interstate highway. Dropped super fast after that too. I think the actual state of health is well below 50%
Should still be under warranty, maybe go see a Nissan dealer?
@@slhs1992 Yep, I did. Parts are on back order but I don't care because they gave me a Aryia for a loaner!
@@DaddyEric222 Nice one! 😀
wow so may weak cells, voltage sag is massive :(
Slovenia looks amazing by the way - would love to see some videos of you driving an EV around the countryside :)
Thank you. Indeed Slovenia is a beautiful country and it never crossed my mind to record a trip. Might do that in the future.
Very good video, thanks! I am really surprised that a battery with 82% State of Health would perform so badly! I would never have expected that.
It is so sad to see that Nissan was pretty much the first company to have a decent mass-market EV. This is now the state of it. BYD and MG seem to be of better quality, and they haven't even been making cars for a decade.
When a new brand gets introduced to the market, it simply has to do it's best to build a strong user base, good reviews and to prove it is worth considering. I don't doubt that Chinese will do their best to attract and hold their EU/US customer base. Their quality and support will have to be impeccable. And it will be or they will fail. Nissan lost trust of many of their customers. When the word gets out it is hard to regain trust. We'll see soon.
@@slavric All the Japanese brands are lacking when it comes to EVs. I think Chinese cars will replace Japanese cars in the coming decade. Lots of countries are now starting to ban ICE cars sometime in the 2030-2050s.
Koreans are doing great tho, we have an ioniq 5 and it's awesome.
You can see the dip under load in voltage on the left side of the cell voltages chart. Those cells are in the rear stack, sandwitched together.. The inner cells are hotter, and age faster than the cells on the side. That's why you see the 'V' shape there. 4:08
My Nissan leaf 2018 40KWh is 190000 and running into the same issue when running at 50% battery or less. What is the solution? Module replacement or whole battery replacement? Also how much would it cost to replace either?
Thx 🙏
Buying new battery is hardly an option, because it is too expensive. Buying used battery is a huge risk since you never know what you will get and they are insanely expensive. Cell replacement is in my opinion the best option if you want to keep the car. There is no need for additional CAN bridge and the LBC learns new capacity slowly. In this car it went from 82% to 91% already without programming. Also it looks like it heats up less then the original. total cost is about 6,500€.
Bin
What is the HX Value?
You mentioned it is more important than the SOC, may you explain it to me please?
I own a 40kW Leaf as well, my SOC is already down at 92%, 65.000km and less than 100 Fastcharges
Hx is internal resistance I believe. Leafspy explaines all numbers and function pretty well.
Please, check on the link, it is discussed quite in detail mynissanleaf.com/threads/leaf-30kwh-2017-any-opinion-on-those-graphs.34961/
Nice video. Nissan, you can do better. Another dead 40. I consider HX on 40 kWh packs as SOH because it's so much better representation of the real battery condition. Greetings from Los Angeles.
Greetings back to you from my tiny Slovenia.
interesting issue, haven't seen it so far in any other vid. I would expec BMS to limit power output to try and avoid such voltage sag but seems that it's poorly implemented.
Gospod Srečko pozdravljeni. Sem iz Črnomlja in sodeč po videu sva skoraj "soseda". Vas bom kar takole vprašal v materinem jeziku: sem pred nakupom Nissan Leafa in vidim, da jih poznate v dušo. Na volje je avto z 41kWh baterijo,uvoz iz Nemčije, prodaja firma, po števcu narejenih 5000(pet tisoč), prva registracija september 2021. Avto res zgleda kot nov, cena zelo ugodna. Ali bi mi me moralo skrbeti kaj v zvezi z baterijo ali kaj drugega? Odločiti se moram do ponedeljka. Hvala za odgovor. Lp :)
Pozdravljeni. Sicer niste napisali, kakšna je ta ugodna cena, ampak smatram da okrog 15.000 do 17.000€. Leaf je povsem v redu avto na splošno, ima pa zelo znano napako v zasnovi baterije. Avto je v redu za krajše razdalje in polnjenje doma, za daljše razdalje z vmesnim hitrim polnjenjem ga je pa škoda, ker bo baterija hitro degradirala. Jaz osebno ga zase nebi kupil, razen če bi bila cena res ugodna. Z njim lahko pričakujete kakih 200.000km, potem bo pa počasi treba razmišljati o zamenjavi baterije. Leafa ima žena za v službo in nazaj, občasno za v mesto. Za ostalo pa imam Hyundai kono, je veliko bolj varčen in trpežen avto in tudi pelje se bolj agilno, baterija pa bi morala zdržati približno dvakrat dlje. Obilo sreče pri nakupu.
Internal resistance is the best indicator for battery health, this is shown by voltage drop under load, that battery is very poor.
I fancy a used ev but the reality is batteries have limited lifespan and so many cells in a car makes it expensive to replace.
I have flown rc models with lipo batteries for many years and results vary wildly depending on quantity of battety in the first place and the way they are used.
Some have lasted 15 years still going and others didnt make 6 months...
The LEAF is cheap enough now (on the UK used market at least) to take a risk. Most cars will have been charged slowly, and driven normally. You can do basic health checks on the battery before you buy. I've bought a 2018 LEAF recently and plan to keep it for a couple of years. It won't be going on long journeys very often, and it will still have plenty of range when I sell it on. Aside from the lack of battery cooling, the LEAF is a reliable car that can be great value. Another EV with battery cooling will be a safer bet, but you will pay for that added security so you can't win!
Your battery is almost dead and out or warranty. Who ever quick charged the car 971 times killed the battery. Was quick charged 971 times and slowly charged another 2351 times. Looks like a taxi. Mileage is way too high aswell for a car that wasn't used as a taxi.
It's probably not the number of QCs in total, but the number of QCs in succession that have damaged the battery. When Nissan "fixed" the rapidgate problem in the LEAF 40, that probably didn't help as the charge power was being limited for a reason in the old firmware: to preserve battery life.
Hi mate. How many cells did you have you buy and how much was the cost?
I bought a 40 kWh Leaf with 60k km but can only get a range of 200km driving calmly. The capacity is 12 bars but I haven’t got leafspy. I think mine is done like yours…
Hello. I don't think your battery is as bad as this one. Leaf is not as efficient as Kona so getting 200km out isn't so bad. Buy a dongle for 5€ and test it.
@@slavric I actually had a Kona 39kWh a while ago and I’m shocked at how these cars are different. I miss it so much. Do you know what normally is the range you can expect from a 2018 Leaf 40 with 60k km?
@@danisantos3255 This is really hard to predict, you know yourself how different results can be. My guess is around 200 to 230km. It is hard to get Leaf under 13kWh/100km and easy to get Kona under 11. Leaf is a nice car for my wife, commuting daily 30km, sometimes shopping adds another 20km daily. It's for the 2nd car in family. Kona is more stable and jumpy, more efficient and precise in steering. Since I live in a small country it is just fine for me. I also have 39kWh version which is lighter and has "only" 100kW of power. It is totally enough for this kind of a car.
@@slavric hey mate. Thank you so much for your patience. I’m actually roadtripping right now because I bought the Leaf at the other end of the country and I still haven’t got the OBD dongle. So I tried something today. I set off with 100% SOH and drove 180km to 11% with 14,6kWh/100km avg consumption. This gives me an estimated 29,5kWh battery capacity from 100-0%. Is this around the same as your car? Can I expect about 15% battery degradation?
I find the Kona to be much more comfortable, better ergonomics, more predictable… it really is a nice car :)
@@danisantos3255 It is really hard to say without LeafSpy. Actually Hx is also very important and uphill test should be performed to check cell imbalance under load. But let me guess. Your battery will have around 83% SOH and 75% Hx. Let me know when you check it.
Battery does not perform on heavy load. How long you can run on it in eco mode? Maybe somewhere in flat land and without full throttle that battery would last another 180K km.
I doubt, that it would last so much longer. The cells are extremely inflated, just before bursting. Even if it would drive, it is far from safe. Highway also drains it instantly.
@@slavric If you saw cells are physically damaged and inflated, then it may explain whats here. What is interesting here that leaf spy SOC and car battery percentage so different.
@@slavric I saw discussion on mynissanleaf. Thanks.
i have a 40kwh leaf and same problem. :)
Wow. My advice: buy a second electric but as new as possible. Even if it’s a Chinese one. It will always be better than a 10 year Nissan with 82% SOH.
I would say: run a battery health check that includes the internal resistance before you buy. My 2014 LEAF has 85k miles on the clock, but the Hx is still over 80%, so it's fine as a short journey car. I will never travel more than 50 miles per day however.
Esa batería tiene celdas en mal estado...
Look at the GOM at this time: czcams.com/video/3bQr29xO8E0/video.html
720mv !! dam