vtechtuning
Posts: 64
Joined: Wed Dec 16, 2015 7:16 am
Location: Krakow, Poland
Contact: Website

First test of 19,5 kWh battery in PHEV

Mon Oct 03, 2016 10:26 pm

I have built prototype of higher capacity battery, by replacing factory modules of 8xL40 with my modules, built from chinese cheap cells (as this is prototype, I wanted to test if it works) of 19,5 kWh total installed inside factory battery (I have spare one - thx Anko :) ). Factory BMS handles this (with small tweak). I cannot say that first tests are full success (some issues while driving like - car is not regen at all for first 20 km of drive) but it more or less works. Some videos soon.
Alcohol won't solve your problems. On the other hand, milk won't solve them either...
Outlander PHEV & Nissan Leaf tuning http://evtun.com

anko
Posts: 3405
Joined: Mon Dec 01, 2014 11:30 am
Location: Netherlands, Utrecht area

Re: First test of 19,5 kWh battery in PHEV

Tue Oct 04, 2016 12:18 am

Nice :geek: Please keep us posted!

BTW: Could it be that regen only starts after capacity drops below a certain fixed Ah value?

Fecn
Posts: 53
Joined: Tue Sep 06, 2016 3:25 am

Re: First test of 19,5 kWh battery in PHEV

Tue Oct 04, 2016 3:18 am

Nice work vtechtuning - very much looking forward to seeing those videos. Cheers!!
2016 GX5h since 7/10/2016
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ian4x4
Posts: 227
Joined: Mon Aug 25, 2014 11:06 am

Re: First test of 19,5 kWh battery in PHEV

Tue Oct 04, 2016 6:50 am

vtechtuning
Please can you indicate what your objectives are, if any, other than increased range.
Have you increased the maximum charge/discharge rate?
If so, will their be any additional battery power available before the ICE starts (during acceleration), and can the charging rate be adjusted from standard, to give similar charge time.
Also does your new battery pack weigh much more.
thanks Ian
Last edited by ian4x4 on Tue Oct 04, 2016 7:10 am, edited 1 time in total.

PolishPilot
Posts: 186
Joined: Wed Sep 03, 2014 11:27 pm

Re: First test of 19,5 kWh battery in PHEV

Tue Oct 04, 2016 7:03 am

Great news!
100 km range, which is probably possible with this setup, is the minimum I consider practical in my case.

anko
Posts: 3405
Joined: Mon Dec 01, 2014 11:30 am
Location: Netherlands, Utrecht area

Re: First test of 19,5 kWh battery in PHEV

Tue Oct 04, 2016 8:54 am

PolishPilot wrote:Great news!
100 km range, which is probably possible with this setup, is the minimum I consider practical in my case.
52 / 12 * 19.5 = 84.5. Why would you think 100 km is possible?

Unless, the low water mark for recharging is not kept at 30% but at 3.6 kW. In that case, the equation becomes:

52 / 8.4 * 15.9 = 98.4 :lol:

But that is all in theory, based on the brochure values.

elm70
Posts: 1156
Joined: Mon Sep 26, 2016 11:18 pm
Location: Poland
Contact: Website

Re: First test of 19,5 kWh battery in PHEV

Tue Oct 04, 2016 11:56 am

vtechtuning wrote:I have built prototype of higher capacity battery, by replacing factory modules of 8xL40 with my modules, built from chinese cheap cells (as this is prototype, I wanted to test if it works) of 19,5 kWh total installed inside factory battery (I have spare one - thx Anko :) ). Factory BMS handles this (with small tweak). I cannot say that first tests are full success (some issues while driving like - car is not regen at all for first 20 km of drive) but it more or less works. Some videos soon.
How easy is to gain access to the car battery pack?

Something that everybody can do, it are needed specials equipment?

How is handled the electronic around the battery pack?

Is there already a "balancer" of the cells while charging ? Or this is integrated into the battery pack?

Thanks in advance

e_lm_70

ps: How much did cost you to build your battery pack ?

pps: Just did a little math ... using 20USD HobbyKing Multistart 5200mAh 4S ... one of the 10 block would be costing 320USD .. and the full battery pack replacement will be 3200 USD ... not even too bad .. but what is shocking is the difference in weight ... only 68KG for build the 12.3KWh pack ... vs 180kg :o

george
Posts: 29
Joined: Sat Feb 28, 2015 8:29 am

Re: First test of 19,5 kWh battery in PHEV

Thu Oct 06, 2016 4:20 am

Just a curiosity, is the battery level bar on the dashboard related to battery voltage? So that it indicates the battery level for any battery?
Thank you vtech.

elm70
Posts: 1156
Joined: Mon Sep 26, 2016 11:18 pm
Location: Poland
Contact: Website

Re: First test of 19,5 kWh battery in PHEV

Fri Oct 07, 2016 4:51 am

george wrote:Just a curiosity, is the battery level bar on the dashboard related to battery voltage? So that it indicates the battery level for any battery?
Thank you vtech.
Via OSB apps can know the voltage for each of the 80 50mAh battery in the car.

I would expect that there is some "balancing" happening .. else one single cell can be over discharged or over charged .. sp the total bettery voltage is a good indication

The battery level on the dashboard is a tricky "beast" ... when shown 0, in reality battery level is 25% ... and possible .. battery are never fully charged too ... so .. shown 0% is 25% real .. shown 100% is possible 80% real ... and for show this "tricky" beast .. it is only needed the total voltage output .. (4.25V per cell is 100% ... ~3.3v is 0% .. not 100% it can be consider liner)

People that own the right app (it cost around 20USD) can have a more acurate figures about what is shown in dash board based on the battery voltage

Note .. that under load .. battery voltage goes down .. making hard to predict battery capacity under load ... so .. I guess the PEHV must have some logic here .. it may even count the ammount of current used and use this info for update the dashboard

PS: I'm using Lithoum battery since over 10 years on RC models ... and predict the battery capacity left .. for avoid losing an RC model due to missing power ... and as well ... over charge and over discharge, plus other factor .. effect the Lithium battery life .. and these battery are relative expensive also in the RC model world ... even if price did sink a lot in the last years ...

Esparza
Posts: 41
Joined: Tue Mar 22, 2016 1:17 pm
Location: Spain

Re: First test of 19,5 kWh battery in PHEV

Tue Oct 18, 2016 5:13 pm

I've seen that the pack has a 350 Amp fuse at the output line and a 70Amp fuse in the Chademo line so even with a bigger pack we can`t go over 100kW of output power and 21kW of Chademo no?

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