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Generator & Battery in Parallel

M Sayed

Apr 20, 2022
1
Joined
Apr 20, 2022
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1
I am thinking to connect Lithium Battery & DC generator in parallel to drive the motor.
For e.g Lithium battery rating is 48v 20 ah with 1c discharge rating.
If my motor needs 10 ampere, I want 40% & 60% load sharing between Battery & Generator. 4 amps from Battery & 6 amps from Generator.
I know when Generator ramps up it will bypass the battery voltage which will cause difference & generator will try to charge the battery as well as drive the motor at the same time.

But since I don't want to charge the battery anytime what circuit I should use ?
Is this possible to avoid charging battery & split the load ??

What I understood up till now that in order to connect any two source in parallel we need voltage to be same irrespective of Ah, then both the source will be fully discharge at same time otherwise Current will from high voltage to low voltage which will try to equalize.

Please guide me if we need to match the voltage of battery then what should be done since battery voltage will change instantly under load & generator can't ramp up high in seconds to match the voltage.
 

Alec_t

Jul 7, 2015
3,587
Joined
Jul 7, 2015
Messages
3,587
You could connect the battery via a power diode to the motor. The higher of the generator voltage and the battery voltage (less the voltage drop across the diode) will determine the voltage applied to the motor.
Welcome to EP!
 

bertus

Moderator
Nov 8, 2019
3,304
Joined
Nov 8, 2019
Messages
3,304
Hello,

I would take care that the lithium battery is treated the right way.
There are special measures needed for charging the battery.
If not correctly treated, the battery may overheat and even explode.

Bertus
 

crutschow

May 7, 2021
839
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May 7, 2021
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839
Yes, it does rather sound like the common "hey, I just invented a perpetual-motion, over-unity motor-generator device". :rolleyes:
Of course you need a battery to get it started.
 

CircutScoper

Mar 29, 2022
300
Joined
Mar 29, 2022
Messages
300
Yes, it does rather sound like the common "hey, I just invented a perpetual-motion, over-unity motor-generator device". :rolleyes:
Of course you need a battery to get it started.

And trust. Maybe it worked in simulation.
 
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