EV car conversion hardware

Introduction and miscellaneous that we haven't created categories for, yet
chentron
Posts: 40
Joined: Mon Feb 22, 2021 3:25 pm
Location: Spain

Re: EV car conversion hardware

Post by chentron »

will I get a nice fire if i connect a PTC like this rated to 230V to my 380V battery ?
Or will heat fast my car in the long winter ?
:-)


sfk wrote: Mon Nov 25, 2019 5:44 pm I bought something like this PTC heater core - https://www.aliexpress.com/item/32815414254.html

I found one that closely matched the size of the heat exchange matrix in my car's existing heat/ventilation system.

There are different sizes, voltages, heat outputs etc.

HTB1O7SvRFXXXXaCXVXXxh4dFXXXA.jpeg
Specifications:
Rated voltage: 110V
Rated power: 1000W
Size(approx.): 140*102*26mm ( ripple length: about 96mm)
Alibro
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Location: Co Armagh, N. Ireland
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Re: EV car conversion hardware

Post by Alibro »

I got one of these last week and it looks just like a modern version of the used one I bought.
https://s.click.aliexpress.com/e/_DBFaueB

New on left and old used on right.
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IMG_20220721_162639503.jpg
IMG_20220721_162649325.jpg
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The quality of the plastic and potting compound appear to be identical, the wires are silicon covered, the nuts are A2 stainless and the terminals are platted copper (thanks for putting me right here remy_martian), the new one is around 10g heavier.
If this is fake is a damn good quality fake. The only thing I could say against it is the label has a few air bubbles.
It seems to draw approx 500mA initially then drop to 120mA
I need a bigger hammer!
remy_martian
Posts: 40
Joined: Fri Mar 22, 2019 7:44 pm

Re: EV car conversion hardware

Post by remy_martian »

Stainless? 🤮

They are supposed to be silver plated copper studs, not shiny Chinesium. It also explains the added weight.

👎
Friends don't let software people do hardware design
Alibro
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Location: Co Armagh, N. Ireland
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Re: EV car conversion hardware

Post by Alibro »

remy_martian wrote: Fri Jul 22, 2022 5:58 am Stainless? 🤮

They are supposed to be silver plated copper studs, not shiny Chinesium. It also explains the added weight.

👎
Sorry, my mistake. They ARE plated copper. I should have checked properly. I'll edit the original post
So I'm still looking for the issue here.
Maybe in a few months after putting it in a battery box buried in my conversion I might find out. :o

So would you prefer to use one of these or an older used one?
When I bought the older one I bought two and one of them turned out to have a high resistance of between 10R and 1kR, it was kinda all over the place.
Thankfully I checked BEFORE using it but if I hadn't who knows what would have happened.
I need a bigger hammer!
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SciroccoEV
Posts: 315
Joined: Thu Oct 10, 2019 1:50 pm
Location: Luton UK

Re: EV car conversion hardware

Post by SciroccoEV »

I've got an Infineon FS800R07A2E3 IGBT module (same as BMW I3 and Leaf Gen3 inverters) and driver board combination sitting on my bench. It's complete with 900Amp LEM phase current sensors and possibly isolated voltage measurement.

Going by the markings, it came from a Dajun Tech inverter (Chinese motors and drives company) and they seem to be readily available as surplus.

I'd like to do some testing with it and work out the pinout. The first task is to find a matching connector. It seems to be1.27mm or 0.050" pitch 30 pin connector, with metal plates at each end for a latch arrangement. Whilst finding something that will plug in is pretty easy, it would be nice to find the correct mating connector that will actually lock in place.
IGBT1.jpg
IGBT2.jpg
IGBT3.jpg
Mobert
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Joined: Wed Jun 03, 2020 6:11 pm
Location: Austria

Re: EV car conversion hardware

Post by Mobert »

Hi SciroccoEV

That's a Samtec Tiger Eye 1.27 pitch Connector.
Part Number for a 10 inch 30 pin Cable:
SFSD-15-28-H-10.00-DR-NDX
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SciroccoEV
Posts: 315
Joined: Thu Oct 10, 2019 1:50 pm
Location: Luton UK

Re: EV car conversion hardware

Post by SciroccoEV »

Mobert wrote: Tue Aug 02, 2022 11:31 am That's a Samtec Tiger Eye 1.27 pitch Connector.
SFSD-15-28-H-10.00-DR-NDX
Perfect, thank you.
kiwifiat
Posts: 90
Joined: Sat Dec 22, 2018 9:39 pm
Location: Vancouver, Canada

Re: EV car conversion hardware

Post by kiwifiat »

A start has made on that module over on ES: https://endless-sphere.com/forums/viewt ... 0&t=115094
Very tempting given the price.
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SciroccoEV
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Location: Luton UK

Re: EV car conversion hardware

Post by SciroccoEV »

A start has made on that module over on ES:
Thanks again. I had already identified the power supply and ground connections, but that gives me a small headstart.

Matching cable just delivered from RS.
IGBT4.jpg
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