2019 MG ZS EV battery disassembly.
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- Опубліковано 12 лют 2024
- Opening up a 430V EV battery pack that has done 5 years and 115k miles on the road to see what its like inside and recycle the modules for a second life application.
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Very interesting video. If this simple pack was the norm, local (properly trained) garages could check and swap modules easily and send the faulty ones to a specialist facility to be refurbished. It would bring down the cost of repair, provide good value work to local garages and greatly expand the life of cars and their batteries.
Thanks for the great comment and absolutely this pack was built to be serviceable unlike so many others. It does make you think about the true motives of some OEM’s for sure who would rather the battery (or even the car) be disposable.
Nice one Brad - very interesting strip down and discussion regarding the complexity of the pack for future maintenance. I've got a Tesla for work, so a four year hard test without the worry of a costly battery replacement! 😄
Cheers. For sure this MGZS pack has been designed with maintenance in mind, whether that’s down to them not having much confidence in the cells they have used or because it was cheaper to do this way I’m not sure. There’s no doubt Tesla are still the benchmark when it comes to EV’s but it definitely wouldn’t be this easy to strip down. Lovely machines too 👍🏻
good work
Awesome and interesting video! Hope to see more videos in the future.
Subscribed!
Appreciate the comments. The next videos will show what we do with the old modules. Cheers
Nice
Very informative thanks.
A fellow from western Australia bought a Byd atto 3 for the battery stripped it down for the battery to use as a home battery. He found the blade battery blades were glued together. He had to leave it in one peace to use as he could not separate the blades. After seeing this I changed my mind in regards to buying one. I am still trying to find out how the mg4 battery looks.
I think you may find that it is similar. I almost brought two additional modules from eBay that look the same as these as I need two more to make up the final battery. These I believe came from a Vauxhall. It was only when I did some checking I found that they are the lower voltage. 3.5 volt cells. And not the 4.2 that these ones are. I think that the mg5. Use the 3.5 volt cell. But same type of modual construction. But need to research. A bit more. Bill
There was some talk that the mg4 had a catyl blade battery. I was thinking of buying a mg4 but didn't want the same battery as the byd. As when it came recycling the blade is useless. If involved in a accident or end of life, the battery modules could be used or easily used else where. And if people where looking for this type of battery the used car has more value. @@bill2960
It would be good to add a short section on the contactors and assiciated wiring and safety lock-out that are presumably hiding in that front section of the case under the orange cover. But good follow-up to the swap video
Thanks for the comment and good shout on the control box, we should definitely show you all what’s in that 👍🏻
Im interested to know if a newer pack 2020+ with higher kwh would fit the same frame or the frame is even the same size. If irs possible to switch a 44kwh with a 67 kwh or what ever size available to the same car model.
Good to see the technology is quite simple clear. I'm driving a ZS EV for 4 years now. I really like the car, but a few miles extra on the battery would be ideal. I assume that CATL might have new cells with slightly higher capacity with the same dimension. Take out the old cells and replace them with a same size higher capacity, would that do the trick, of would the bms and electronics go out of their mind? Any thoughts on that?
hmmm, CATL cells and MG Rear Motors look well built too. I was leaning towards using EV6 modules for my conversion but if the motor will fit i may use these.
Thank you
What conversion are you doing?
@@Triplebengineering Hi, wow, that was quick.
I bought my 1970 VW Camper 2 years ago and have been ready to covert it and get back round the world with it every day since.
Sadly most companies i've approached have been prohibitively expensive or just all talk, so i've been studying your trade every day since.
I will still need a workshop and help which i'm still working on but would also still be up for just sticking it on a tow truck and sending it to a specialist if you know of either?
I'm in Bucks.
John
P.s. if you have the dimensions of the ZS motor that would help greatly too. Cheers
Great video although as you have said below, its a pity there was no obvious point of failure. Speculating here but would the overall BMS keep the modules at the same total voltage but there may be one (or more) modules which, while at 24v overall has one low cell and all the other cells at their maximum voltage ?
Each of the cells (all 108 of them) have an individual sensor monitoring that cell so the BMS knows all 108 cell voltages and keeps them in check when charging and discharging, the cables connecting each module daisy chain the BMS slave boards inside each module together so they can all communicate with the master BMS, at least that would be my guess :)
I have some experience with these.
They use a ltc6813 afe in each master module using isospi they communicate with the bmu ( BMS) I wondered how they worked the cooling into the base would it be possible to slice or cut a segment of the battery case where the cooling is so we can get in idea on thickness of material used to make the frame and supporting base structure of the pack . ? What happend to this pack it failed but do we know exactly why.?
Hi. If I was going to scrap the Alley I would. But at the moment I am keeping the pack as a possible rebuild project. With some other cells. Keeping the exsisting bms. Etc. what I will say is I was impressed with the construction of the pack . The cast aluminium box is well ribbed to provide strength the battery modules are all bolted to the welded in base plate this I believe is more ductile than the cast case. So in the event of the pack some how being bent the outer case will crack and shatter and absorb Energey while the base plate will tend to hold things in place and Bend each of the module are conected with a flexible busbar so can move with respect to each other some small amount while bolted hard down to that base plate . But when you look at positioning of the battery between the steel rails mid part of the car it is going to be some serious collision before this start to be a problem unless the car is rolled over on to a bollard direct impact the the base of the battery . And in this I think this would still take some abuse .
Very Useful video, thanks for the attention to detail.
What is the dimension of the modules please?
Good to see you both continuing to play on Bill's old pack and the suitability for maintenance. I think at a module level you didn't find a duffer being all about 24.1V?
That was the surprising thing, we expected to see a bad module but as you can see from the video they were all within 0.02V of each other.
@@Triplebengineering would the battery internal resistance be measurable? That could identify a bad cell/pack.
Hi, who is the manufracturer of modules ?
I believe the cells are supplied by CATL and the packs are then built up by the OEM SAIC (Shanghai Auto) who own MG
wow, great job! could you elaborate on the dimensions of the pack please?
355 x 150 x 115. Mm. Length width hight
@@bill2960 thank you so much!
Great video thanks chaps. Would it be too much to assume the one in my MG4 is very similar ?
Similar, most likely but possibly not identical as depending on what version you have it could either be an LFP battery or an NMC battery so the designs will differ slightly. It’s fair to assume that the overall design concepts will be similar however.
Thanks sorry silly me should have specified, it’s an SE model (basic) so LFP.
@@Triplebengineering I think the MG 4 packs are 96 large cells in series and skip the module stage. Not sure if that makes it easier to tear apart in the future though. 🙂
Wouldn't it have made more sense to split the pack first, rather than taking out the low voltage stuff with the pack at 400v?
That logic is sound but in reality some of those BMS “comms” cables actually have full pack voltage on them anyway as they do the cell monitoring so it wouldn’t make too much difference from a safety perspective. The reason we did it the way we did was to get nice clear access to the HV busbars by removing all the other cables first.
that cooling pipes around batery reforce that chinese cars are times bomb...
What makes you say that? Almost all high c rate batteries are liquid cooled and actually the cooling on this pack is quite well designed.
Great video but please remove the background music. It's not needed and annoying
Appreciate the comments, just didn’t want it to be too dry so added the background 😊
@@Triplebengineering I had difficulty hearIng the conversation too.
@@briangriffiths1285 safe to say I know cars and electronics far better than I do video editing :) but we will keep learning as we go 👍🏻