HCH2 - IMA battery reconditioning

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Dec 15, 2020 | 11:41 AM

#51

cuky

Enthusiast

Joined: Jul 2020

Posts: 6

Re: HCH2 - IMA battery reconditioning

Hello I finally managed to build my grid charger, but the battery heats up quickly, Can someone help me, how to connect the PWM controller on the HCH2 Fan. Where do I connect the (+) and (-) cable from the PWM controller to the HCH2 Fan? Thanks

Dec 15, 2020 | 03:22 PM

#52

Coval

Training wheels fitted

Joined: Dec 2015

Posts: 33

From: West London - UK

Re: HCH2 - IMA battery reconditioning

Quote:

Originally Posted by S Keith

The HCH2 requires a PWM controller to properly drive the in-car fan, or you can short the PWM cable to ground and drive the fan with a 12V/10A power supply (it's powerful like a leaf blower). Coval installed a simple 12V 80 or 90mm fan in the exit duct blowing into the trunk (thus it sucks air through the battery from the interior). In my case in, this was not sufficient except in the coolest months.

Yep, the 12v computer case fan isn't powerful enough and only does the trick in cold weatber. Unfortunately I don't know how to rig up car's own fan, but it seems like a sensible solution.
Good luck and keep safe!

Dec 16, 2020 | 08:47 AM

#53

Coval

Training wheels fitted

Joined: Dec 2015

Posts: 33

From: West London - UK

Re: HCH2 - IMA battery reconditioning

While I am here, let me wish you all a Merry Christmas and a safe, Happy New Year!

Dec 16, 2020 | 10:56 PM

#54

Kevinmce

Enthusiast

Joined: Dec 2018

Posts: 43

Re: HCH2 - IMA battery reconditioning

Have a look here for my working schematic for the fan controller.

https://www.greenhybrid.com/forums/f...tml#post267269

I think I also link the pwm controller that I bought, but if you search aliexpress for pwm controller I'm sure you can find a similar one. Also the pwm controller should have it's pwm signal disconnected with a 12v relay. Can be a standard automotive relay.

Last edited by Kevinmce; Dec 16, 2020 at 11:04 PM.