Semi hybrid system

Electric cars, trucks, ATVs, NEVs - things bigger than a motorcycle.
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Skrzypas   10 W

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Posts: 65
Joined: Jun 16 2014 3:08pm
Location: Warsaw, Poland

Semi hybrid system

Post by Skrzypas » Oct 25 2016 1:14am

Hi guys,

I can't find any information on such a system:

What about separation of the electric system from the engine in a regular petrol car.

Description in points:
1. Remove the belt from the alternator.
2. Add a pretty large Li-ion pack, 4S at least (CA. 14V)
3. start engine from the standard lead-acid battery.
4. Power everything else from Li-ion.
5. (optional) change alternator to an electric motor of similar size to drive the air condition belt (also from li-ion)

I wonder if such a system would allow saving some gas. I think the battery must be capable of doing ca. 1000 km, or the alternator should be mechanically / electrically connectable to recharge the battery in case someone forgets to charge at home. What do you think? Someone tried it?

Hillhater   100 GW

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Location: Sydney ..(Hilly part !) .. Australia/ Down under !

Re: Semi hybrid system

Post by Hillhater » Oct 25 2016 4:27pm

Search out info on the Mazda 6 Energy recovery system.
Very similar except its more sophisticated and it uses Ultracaps instead of a Li pack to capture regen.
This forum owes its existence to Justin of ebikes.ca

Skrzypas   10 W

10 W
Posts: 65
Joined: Jun 16 2014 3:08pm
Location: Warsaw, Poland

Re: Semi hybrid system

Post by Skrzypas » Oct 26 2016 7:47am

Thank you, actually I drive a Mazda :)

Will try to take their idea into account and maybe develop an easy conversion kit if my preliminary tests succeed.

cycleops612   10 kW

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Location: Sydney Australia, Me: 70kg/154lb. 350w, 22kg ex battery, 24 speed axial mid-drive Bofeili MTB.

Re: Semi hybrid system

Post by cycleops612 » Nov 23 2016 10:40am

Last I heard, a/c was 10% of fuel used, so in this context, it certainly seems the low hanging fruit for easy gas savings in hot climates.

Simply have a plug in pak sufficient to power a/c for your typical journeys.

Dunno, but some new a/cS may be electric anyway.

I have long thought a great app for regen, is refrigerated trucks - mechanical regen. They mostly have separate ice motors for refrigeration, running hard, certainly with stop start food deliveries to shops etc.

If load temp can vary within certain ranges, then large bursts of regen power can be absorbed by a suitably powerful compressor, so long as the ~frozen goods dont get too hot or cold for too long.

Making the load cooler than need be, is equivalent to charging a zero net weight, very large battery. It delays any need for the ice compressor motor to kick in.

Maybe a modified truck PTO unit as a mechanical link from wheels to a compressor?

Similarly, but to a lesser extent, a/c passenger trains and buses would save fuel very simply, by partly using regen for a/c. Urban ones happily stop a lot, AND open their doors a lot to warm air. Perfect.

Unlike electric regen, excess regen power can easily be shed

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