Battery NMC of MGS5 EV...

[Nautilus71]

where can I find the full specifications of the new 64 NMC battery of the MGS5, another question I charge the battery weekly 100% to do the whole week of work and still have 25% left will it cause the battery to degrade faster?

 

[Alb]

Have you looked at the owners manual?

 

[Nautilus71]

Thank you, the manual is very technical, my question is whether they are modular and the fact that they are lower gives them any special characteristics?

 

[Bam Bam]

I charge the battery weekly 100% to do the whole week of work and still have 25% left will it cause the battery to degrade faster?

Sounds fine to me.

Don't leave it at 100% for an extended period and don't top it up to 100% every night from 85%, but rather let it run down a bit before doing a bigger top-up.

 

[Nautilus71]

Parece bom para mim.

Não deixe em 100% por um período prolongado e não complete em 85% até 100% todas as noites, mas deixe escorrer um pouco antes de fazer uma recarga maior.

Sounds fine to me.

Don't leave it at 100% for an extended period and don't top it up to 100% every night from 85%, but rather let it run down a bit before doing a bigger top-up.

Thanks

 

[Lovemyev]

Sounds fine to me.

Don't leave it at 100% for an extended period and don't top it up to 100% every night from 85%, but rather let it run down a bit before doing a bigger top-up.

Spot on @Bam Bam good advice.
Is the concern by @Nautilus71 that because it’s using the NMC chemistry, then charging to 100% every single time, could that have a detrimental effect on the long term life of the pack maybe .
Well we know that the 100% charging is aimed at long journeys and charging to 80% is recommended for everyday day to day routes.
As the OP still has 25% left at the end of the week, what about trying to dropping the charging level down to 90% maybe and see how that works out ?.
Just to save maxing the battery level every single time that’s all .
Just an idea .

 

[Nautilus71]

Thanks for the tip Lovemyev, but what is more harmful, charging above 80% or letting it go below 20%?

 

[Ian Key]

On the app between 40% and 80% is labelled health mode. So is there any reason you can't charge twice a week to keep it between those figures and take it to 100% once a month?
In the colder weather you will have to charge the car twice a week, possibly three times anyway.

 

[5teep]

Thanks for the tip Lovemyev, but what is more harmful, charging above 80% or letting it go below 20%?

The most harmful is DC charging. AC charging is much better for battery health.
The way batteries are shaping up, yours is good for 20 plus years so don't worry about the way you charge it.

 

[sammoj]

Does anyone know which of the two batteries we have in the uk long range? Is it the 62.5 or 64kWh battery? Quite a difference in the number of charge cycles and shelf life of the two.

 

[Nautilus71]

O mais prejudicial é o carregamento CC. O carregamento CA é muito melhor para a saúde da bateria.
Do jeito que as baterias estão se desenvolvendo, a sua dura mais de 20 anos, então não se preocupe com a maneira como você as carrega.

Thanks

 

[TimothyN]

My reading of "The Battery University's" investigations was that NMC should be cycled between 65% and 45% and that that can be done 6000 times before wear sets in, whereas 300 charges to 100% begins to show problems.

Having said that, I can't remember whether that was AC or DC.

I charge every night to 70% on AC granny charging, regardless of the state of charge.

If I expect to do a lot of V2L (I literally heat my house on V2L!), I take it to 80% and, once, I had a long journey and took it to 100%.

 

[5teep]

Thanks

Eeek! I thought my phone had gone weird there

Does anyone know which of the two batteries we have in the uk long range? Is it the 62.5 or 64kWh battery? Quite a difference in the number of charge cycles and shelf life of the two.

64kwh gross, 62.1 useable.

 

[sammoj]

64kwh gross, 62.1 useable.

The manual refers to two batteries if it is the 64kWh then in would be Battery Type 3 but it is confusing as the Type 2 is described as a 62.2 so close to the usable capacity I have seen quoted. Type 3 has a much lower cycle rating and slightly shorter battery calendar life.

 

[5teep]

The manual refers to two batteries if it is the 64kWh then in would be Battery Type 3 but it is confusing as the Type 2 is described as a 62.2 so close to the usable capacity I have seen quoted. Type 3 has a much lower cycle rating and slightly shorter battery calendar life.

View attachment 40197View attachment 40198

I'm sure the battery model is on a label somewhere on the car.

 

[Everest]

Spot on @Bam Bam good advice.
Is the concern by @Nautilus71 that because it’s using the NMC chemistry, then charging to 100% every single time, could that have a detrimental effect on the long term life of the pack maybe .
Well we know that the 100% charging is aimed at long journeys and charging to 80% is recommended for everyday day to day routes.
As the OP still has 25% left at the end of the week, what about trying to dropping the charging level down to 90% maybe and see how that works out ?.
Just to save maxing the battery level every single time that’s all .
Just an idea

I'd try that, or even up to 95%, rather than 100%.

The issue of degradation is complex... as well as the unavoidable calendar ageing, there will be increased dendrite growth (=bad) as the SOC approaches 100% as, in simple terms, there are less "free" places for the charge to be located. This is made worse when temperatures are very low or very high and and when the charge rate is greater.

The other disadvantage of charging to 100% is the vehicle will not be able to do much regenerative braking - even just below 100% it won't be able to recover as much energy, due to limits on re-charge rate at high levels of SOC - so efficiency will possibly be reduced, unless you're setting off on an empty motorway to start the journey.

I'm sure that @TimothyN's concept of using the narrow band of 45% to 65% would optimise cyclic ageing - OK if you recharge every 50 miles or so - but 6000 cycles of 20% is only the same longevity as 1,200 charges of 0% to 100%. Both will give you 300,000 miles. Which, unless you're a taxi driver, the time taken to drive 300,000 miles will probably exceed the calendar ageing of the batteries, the vehicle itself, or in some of our cases, the driver

 

[5teep]

The other thing to remember is that when you charge to 100% you're not. You're charging to 100% of the 61.1 kWh useable. There's still spare capacity in the battery to help protect it.

 

[TimothyN]

The other thing to remember is that when you charge to 100% you're not. You're charging to 100% of the 61.1kwh useable. There's still spare capacity in the battery to help protect it.

Do we know that the unusable is at the top rather than the bottom of the range?

 

[Lovemyev]

There is a usable buffer at the top and bottom of the pack.
The manufacture is fully aware that the degradation is higher when the battery is brand new, so in order not to panic the owners, with a loss so early, they build a buffer into the head into the head of pack deliberately to avoid this situation.

 

[sammoj]

There is a usable buffer at the top and bottom of the pack.
The manufacture is fully aware that the degradation is higher when the battery is brand new, so in order not to panic the owners, with a loss so early, they build a buffer into the head into the head of pack deliberately to avoid this situation.

I found this buffer worked well on my previous Hyundai cars. All 4 of then at around 3 years old had 100& SOH reported back so no apparent loss in 40,000 or so miles and 3 years.