drmcw
Established Member
No the gen 2 SR has the LFP battery. I'd guess passive balancing is used and so only happens at 100% SOC irrespective of battery chemistry.Is that because the Gen 1 has an LFP pack?
No the gen 2 SR has the LFP battery. I'd guess passive balancing is used and so only happens at 100% SOC irrespective of battery chemistry.Is that because the Gen 1 has an LFP pack?
No it has the older NMC chemistry on the original ZS EV ( Gen1 ).Is that because the Gen 1 has an LFP pack?
I'm not sure where in the manual it says not to use a granny cable.
This isn’t right Andy?? The battery cells can only start to balance once the battery pack has reached its max 100% charge.It doesn't need to be 100% to balance. If for instance you set the charge limit to 80% once it reaches 80% and is left plugged in and charging then it will carry on at very low power draw and balance all the cells to the same voltage but at 80% soc. It is recommended to balance at 100% once every so often I should add.
It is right. The cells can be balanced to a soc below 100% . My MG 4 Trophy balances at 80% or 90% . Definitely 100% right.This isn’t right Andy?? The battery cells can only start to balance once the battery pack has reached its max 100% charge.
If you're charging on home point @ 7kw the car will get to near 100%then go down to 2.6 kW ISH then 300 Watts for as long as it takes to balance or it did on the MK 1 ZSManual says to charge below 3 kW when balance is needed.
I believe using the "granny" at home will solve your issue.
How do you know that and where is your evidence the car does what you state ??It is right. The cells can be balanced to a soc below 100% . My MG 4 Trophy balances at 80% or 90% . Definitely 100% right.
Well I can see on the app when it's balancing. And it is a fact that NMC battery packs can balance at SOC below 100% .How do you know that and where is your evidence the car does what you state ??
Evidence?Well I can see on the app when it's balancing. And it is a fact that NMC battery packs can balance at SOC below 100% .
The Gen1 ZS EV had the NMC battery and it will not commence the balance cycle until it hits 100% fully charged.Well I can see on the app when it's balancing. And it is a fact that NMC battery packs can balance at SOC below 100% .
I’d be keen to read the source of your knowledge if you could offer it up, oh and whilst you’re at it, what app are you looking at? Battery Power Online | Why Proper Cell Balancing is Necessary in Battery PacksIt will also balance at soc below 100% . 60, 70, 80 ,90. Will balance if set limit is reached and charger still left on.
Ah okay. My home charger is only 1.5 to 3.4kwIf you're charging on home point @ 7kw the car will get to near 100%then go down to 2.6 kW ISH then 300 Watts for as long as it takes to balance or it did on the MK 1 ZS
Can see why this thread has been named 'AGAIN'... very old story, eh?Well I can see on the app when it's balancing. And it is a fact that NMC battery packs can balance at SOC below 100% .
My MGZSEVLRTC NMC battery only takes a short time to balance when compared to my mki zs EV tooCan see why this thread has been named 'AGAIN'... very old story, eh?
Battery balancing or equalisation is required on any EV with NMC battery chemistry; a 'slow charger' is needed for this and is acheived by any AC charger, not just a 'granny' (that would indeed drive you nuts given the clacial rate). This can happen from 80-90% but as we see, MG recommends from 80% every six weeks or so. Most other manufacturers currently have this 'split' between LFP & NMC on SR vs LR cars (eg Tesla, Ford) & some manufacturers have NMC only models (eg Volvo XC40, C40).
To answer the question about 'proving' this, you can either sit there in the car and observe this when the charging rate drops to a trickle, or, simply look up the stats on a home 7Kw charger if you have one & this shows that decrease in charge level once past 100%; Wallbox Pulsar Plus 7Kw here and this is exactly what the app shows in a graph.
I owned a gen1 ZE EV (NMC) for a couple of years and that's how it worked like clockwork, charging overnight off-peak every two weeks to 80-90%, then to 100% and balance every 6-8 weeks. This was done by the Wallbox app & gave a record of the stats. When doing a battery balance, this awalys took 90mins or so beyond the 100% charge.
All of which is a bit of faffing about (but also applies to other NMC EVs; a bit silly really IMO - we pay a premium for a 'long range' car, but then find this to some degree crippled by the 80% charging rule). I susbsequenlty upgraded to a gen 2 2022 ZS EV SR LFP. What a brilliant thing - no more rubbish about battery charging rules, but also surprisingly much more refined than the gen 1 (suspension, soundproofing, sound system, motor, torque etc). From the same stats on the charger, it is also clear that it does a balance as well beyond 100% but doesn't seem to take all that long.
So I'm inclinded to stick with LFP chemistry, or forthcoming Sodium etc. BTW the only EV that I'm aware of that uses LFP chemistry right across the range is BYD, they're selling like hotcakes in Australia. The Blade battery is used for any and all ranges & the new Seal in particular now must have the longest range of any LFP battery on the market.
Our Gen 1 ( pre BMS update ) would take about 30 - 45 minutes on the balance cycle.My MGZSEVLRTC NMC battery only takes a short time to balance when compared to my mki zs EV too