SHENZHEN FACTORY TECHNOLOGY battery packs- is it real?

[noelho]

My god! You still have not send your old BMS to Vivne? As I remember, it had been a very long time ago since Helen Mao offered you for free help. No wonder they don’t wanna do this again. Since your pack is from AUG, better to ask AUG to solve your problem, isn’t? Vivne is none of business with your pack. Your experience also doesn’t mean anything.

Please re-read his comment and dont jump to conclusions.

My Leaf is 2011 and I love it. I want to swap the battery but with no good source. I did my homework,haha... That’s also why I know your this thing well. Based on my research, I could not find a better solution than vivne. I also talked to their Canadian guy.(I try really hard) He is happy with their quality and services. I may upgrade my pack with them this week.

You are ordering a pack from VIVNE? Good. Then you can share your experience. We are all waiting to see.

 

[lley]

Yaste Tech provides a successfully full solution and provides remote assistance for installation, they are professional.

 

[noelho]

Yaste Tech provides a successfully full solution and provides remote assistance for installation, they are professional.

That is good to know. Did you order from them? Can you share some photos/videos and explanation of what was done? Thanks!

 

[lley]

That is good to know. Did you order from them? Can you share some photos/videos and explanation of what was done? Thanks!

yes you can actually check their YT channel, like
https://www.youtube.com/watch?v=gJ4dSjKWzDk

https://www.youtube.com/watch?v=BUApPSzCI4U



https://www.youtube.com/watch?v=nf7PdY2tXxw

https://www.youtube.com/watch?v=YdV0luOpTkU

 

[noelho]

yes you can actually check their YT channel, like
https://www.youtube.com/watch?v=gJ4dSjKWzDk

https://www.youtube.com/watch?v=BUApPSzCI4U

https://www.youtube.com/watch?v=nf7PdY2tXxw

https://www.youtube.com/watch?v=YdV0luOpTkU

Yeah, we have seen those videos from Yaste/VIVNE/etc official channels, showing their builds/installs/testing/etc, but we are want to see a video from an actual customer, with a successful final end result. So far, we have not seen that.

 

[lley]

Yeah, we have seen those videos from Yaste/VIVNE/etc official channels, showing their builds/installs/testing/etc, but we are want to see a video from an actual customer, with a successful final end result. So far, we have not seen that.

This video was from a US customer that they recommended to me and the range now is respectable and i love it.

 

[noelho]

This video was from a US customer that they recommended to me and the range now is respectable and i love it.

That is assembly still in progress, and it is Yaste's channel. Where is the customer's completed install and review? Does that customer have a channel/facebook page/contact where we can follow up?

Did you order a pack yourself? Where are you located? Can you upload photos/videos of your experience?

 

[lley]

That is assembly still in progress, and it is Yaste's channel. Where is the customer's completed install and review? Does that customer have a channel/facebook page/contact where we can follow up?

Did you order a pack yourself? Where are you located? Can you upload photos/videos of your experience?

sorry i could not share much about the clients infos, but actually you can contact them for details. yes now mine was installed and seems so far everything is fine. Now around 272MI i will see on long term SOH and post here as now on my vacation as well.

 

[Grundignz]

Huh? That’s more than is possible to get from most power sources period. A whole house system generally only wired for 60-140a. This doesn’t seem right. I was under the impression that my leaf pulled a maximum of thirty some amps. The stage two charger I’ve got pulls a max of 40 amps on a 50 amp nema 14-50. Are you talking about stage 3? The car does drain faster than it charges though

A 40kwh battery under a load test 300v@390Amps

 

[Grundignz]

While driving, peak amps is about 230 amps for the 24 kwh Leaf with the 80 kw motor setting, about 280 amps for the 40 kwh models with 110 kw motor setting (same motor, different PDM).

280 amps X 393 volts = 110 kilowatts.

DC Fast Charging at about 55 kilowatts is about 140 amps.

Yes, name brand EV cells are built and rated for very high C rates--both charge and discharge. This is one of the many reasons they are more costly.

Also the cabling and ALL connections have to be fully engineered and exhaustively tested to meet these current levels as well or there will be heat and eventually failure.

I have found under heavy load there is a significant voltage dip making the amp draw go up. This was from 40kwh car load testing

 

[MikeinPA]

390 amps actual? WOW.

edit. 400 amps requires a 1/2" by 1/4" busbar for 65 deg C rise. This would also apply to the cross sectional area of any welds, except aluminum would need even more area.

I know the Nissan engineers developed good electrical hardware in the years spent developing the Leaf battery pack before production began in late 2009. However, does anyone here think the people building these aftermarket packs know how to do this, or even care? After all, we have no address for these builders--so if a pack goes up in the US somewhere, who can we even contact?

 

[Bombastinator2]

View attachment 4970
A 40kwh battery under a load test 300v@390Amps

Yeah this one got explained earlier. Battery pack can have massive output because of the paralell thing.

 

[Grundignz]

390 amps actual? WOW.

edit. 400 amps requires a 1/2" by 1/4" busbar for 65 deg C rise. This would also apply to the cross sectional area of any welds, except aluminum would need even more area.

I know the Nissan engineers developed good electrical hardware in the years spent developing the Leaf battery pack before production began in late 2009. However, does anyone here think the people building these aftermarket packs know how to do this, or even care? After all, we have no address for these builders--so if a pack goes up in the US somewhere, who can we even contact?

I actually thought that the 390Amp draw would already exceed the size of the factory cable from pack to controller , the diameter isn't all that large

 

[Jeffstumpf]

I would think it’s real. How reliable and what quality it is, is yet to be determined. If it has a good warranty and is backed by a reputable company, it might be ok. Caveat emptor ( Let the buyer beware). I would compare it against a Nissan part, a used junkyard part and buying a new EV, then make a decision. I can tell you I have replaced engines in gasoline vehicles and the cost is high and may or may not be worth it.

 

[Riore]

Just an update; Battery will arrive at the sea port on the 26th at 22:00, Just sorting all the paperwork for Australian Customs who are very thorough and stringent. Looks like the other Australian guy is having his installed on the 28th.

 

[coulomb]

I actually thought that the 390Amp draw would already exceed the size of the factory cable from pack to controller , the diameter isn't all that large

It's normal in an EV for cables not to be rated for peak power continuously. An EV only puts out peak current and power for short periods of time. After all, a 40kWh pack can only send 110kW for 40/110 hours, or 22 minutes, full to empty. Most of the time it's cruising at some 20kW, perhaps twice that up a hill. So the cables are rated for less than peak current. It's not like they will fuse or burn at twice their continuous rated current. They just get quite warm, and that can be managed.

 

[NeguE]

View attachment 4970
A 40kwh battery under a load test 300v@390Amps

300v / 96cells = 3.125v/cell
300v*390A = 117kwh
40kwh / 96 / 3.7 = 113A
390A/113A = 3.5 ... Means 3.5C stress , right ?

Probably the stress test was less then 10s and if we are "metal inginer" we will know what area need for metal to support this burst.

 

[Søren Reimann]

Jeg håber, at de priser, du nævnte, er inklusive moms, for de forekommer mig ret høje. I øjeblikket venter jeg stadig på, at mit første parti batterier ankommer. Jeg troede, at skibet ville lande i Koper, men det er på vej til Antwerpen i Belgien, så det vil tilføje mindst en ekstra uge i levering. Jeg deler normalt ikke for mange detaljer, men mine CATL-celler på 42 kWh kostede mig USD4200 DDP for 100 stk, hvilket ser ud til at være en meget god pris. Men det er rå celler med møtrikker og samleskinner, så der vil være meget ekstra arbejde. Når jeg får cellerne, bliver jeg nødt til at lave en ny metalkonstruktion. Faktisk har jeg et firma med industrielle laserskærere og bukkemaskiner meget tæt på mig.

Jeg tror ikke, at pakker samlet i Europa vil være omkostningseffektive for mig, for jeg er ikke slutkunden, men planlægger at være "batterimekaniker" for Nissan Leaf, og jeg samler gerne cellerne til mig selv, hvis det betyder 2000 € i prisforskel.

Hvis du bestiller de samlede pakker til dig, burde de være virkelig nemme at udskifte. Sættet ser meget godt ud og med alt hvad du behøver. Bare et par klik, og BMS er tilsluttet. At splejse 97 ledninger fra BMS er sådan en smerte. For mig er hovedproblemet at fjerne og sætte batteriet på igen fra køretøjet og flytte det rundt. Jeg har også et værksted til min lille virksomhed, men det er for lille til sådanne ting.

Dit batteri kan virkelig være i god stand, fordi du ved, hvad du må og ikke må gøre med din bil. Det kan vare meget længe, og det gør det normalt, men nogle mennesker kan brænde det meget hurtigt.

Jeg tror, jeg har nok information for nu. Jeg vil skrive noget mere, når mine celler ankommer, og om (forhåbentlig) min installation bliver en succes. Vi bør helt sikkert holde kontakten, da vi måske har nogle fælles interesser.

 

[Søren Reimann]

Jeg fik en pris fra Robert Lee på 4080 us med lev. komplet sæt med nye ledninger og stik, 63KV lige til at montere

 

[Riore]

Battery pack has been collected and installation is happening this weekend if all goes to plan.