Open Source 6Kw Charger. Who Whats What Features?

[jackbauer]

This is what I did on the open source charger. One pin reads the pwm the other decides state b or c.

[sawickm]

For reference,

This is a link to the SAE J1772 Standard Document: http://nissanleafwiki.com/images/2/2...ej1772.doc.pdf

-Mark

[mrbigh]

Originally Posted by sawickm

mrbigh,

What kind of charger are you using ?

Please keep the Revolt forum updated on your project connecting the charger to the J1772 interface module !!!

-Mark

As a mater of fact, the EVSE that I will build with this module is more than a dumb simple interface.
I will sence the pilot signal, proximity switch, enable an AC contactor and select L1 or L2 service with GFCI detection built in.
It is not for my electric vehicle yet, but will be a daily interface for my new Plug in Prius arriving by March/April.

[e*clipse]

Would this be possible, or just a pipe dream?

I have a big solar array that puts out about 300V 16A Mpp. I would love to be able to plug my EV's directly into it without using the grid-tied inverter.

Is there a DC bus on this charger that could accept this power? It seems if the charger can accept a wide AC voltage range like 85VAC > 265VAC, it would need to rectify the AC at some point, ending up with a wide DC bus range.

Would it be possible to plug the solar array into this DC bus??

Also, the EV's I'd like to charge have battery packs ranging from about 40VDC to over 600VDC. Would it be possible to work with this range? Would some modifications (that are not normally worth it) be possible?

Thanks a bunch,

- E*clipse

[adamj12b]

Originally Posted by e*clipse

Would this be possible, or just a pipe dream?

I have a big solar array that puts out about 300V 16A Mpp. I would love to be able to plug my EV's directly into it without using the grid-tied inverter.

Is there a DC bus on this charger that could accept this power? It seems if the charger can accept a wide AC voltage range like 85VAC > 265VAC, it would need to rectify the AC at some point, ending up with a wide DC bus range.

Would it be possible to plug the solar array into this DC bus??

Also, the EV's I'd like to charge have battery packs ranging from about 40VDC to over 600VDC. Would it be possible to work with this range? Would some modifications (that are not normally worth it) be possible?

Thanks a bunch,

- E*clipse

The input rectifier is just an array of diodes. You can pass DC straight through it, though there would be some loss. You can tap into the DC bus at the output of the rectifier before the PFC booster circuit. If you attache the panels here, the PFC can regulate it to fill the bus cap and maintain voltage.

I had planed the output to cover 12 to 400V like a Manzanita.

-Adam

[e*clipse]

Thanks, Adam - that was a big help.

What is limiting the output voltage? Component capability, the output of sense resistors, or some combination of both?

Thanks again,

E*clipse

[adamj12b]

Originally Posted by e*clipse

Thanks, Adam - that was a big help.

What is limiting the output voltage? Component capability, the output of sense resistors, or some combination of both?

Thanks again,

E*clipse

In theory, the limit is just bus caps and PFC and output transistor. The voltage sense circuit can be adjusted with different resistor values. The current sensor is good to 100A.

-Adam

[e*clipse]

Sounds good!

So, with a little modification, the output range could be even larger.

It may not be wise to put all that on one charger, but the possibility with multiple chargers is very exciting.

- E*clipse

[SpmP]

Long time watcher, first time poster...
I have done that stupid thing, bought myself 28x100Ah lithiums and no charger...
Original plan was to use 8 12v server PSU's (100-140A!!!) to do the charging... but think it needs more smarts than I have got, and much more experience with lithum 8)
This project certainly fits the bill! (PFC or no PFC, but great you are thinking of these things)

Is it still live? I am very happy to beta/alpha test and provide feedback. My electronics background is too weak to be of _real_ assistance with development, but it is not non-existent and there is a lot of good minds within the close vicinity.

It would be great for me to have something build within the month, but I know thats pushing it.

Adam, you mentioned a BMS, what are you using? I was going to build the one on this forum with top and bottom balancing. I think its a local CHCH design for my mates car 8) (Beamer)

Cheers.