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Old 01-20-2017, 10:49 AM   #1
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Default Discharge or Regenerative Discharge

hi

whats the difference between the two different methods
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Old 01-20-2017, 11:18 AM   #2
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Discharge utilizes the internal circuitry of the charger (resistors) to discharge the battery. You are typically pretty power limited in this case. Regenerative discharge allows you to basically convert the discharge power from a battery into charging power to another battery in a dual port charger or back through the power input to a supply battery. This method typically allows for much higher discharge rates versus using the internal circuitry. On a dual port charger, regenerative discharging can also allow for the use of a large resistor in place of a second battery to absorb the power of the battery being discharged.
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Old 01-20-2017, 11:33 AM   #3
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So you can only use regenerative discharge is charging off a battery not a power supply
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Old 01-20-2017, 11:45 AM   #4
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Quote:
Originally Posted by andrew19 View Post
So you can only use regenerative discharge is charging off a battery not a power supply
Depends on the charger. On iCharger DUOs you can discharge from one port through the second port to either another battery or a large resistor. On single port chargers that is how regenerative discharging works - you are wasting the discharged energy back into the power supply, which must be a battery capable of absorbing it. On single port ichargers you can also do a discharge+ discharge, which allows you to run a resistor bank inline with your charge leads to boost discharging capability, no matter what is on the power supply side of the charger.
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Old 01-20-2017, 12:57 PM   #5
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I have the new orca and will be chargeing initially off my power supply
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Old 01-20-2017, 01:04 PM   #6
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Not familiar with it and cannot find a manual online for it yet.

You may be able to make a simple stand alone discharger and use your charger's balance leads as a monitor/alarm for end-voltage. Would need to see a manual to know what is possible.
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Old 01-20-2017, 01:07 PM   #7
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What is this method useful for? Just wondering... is it just to leave your packs at a specifically discharged state or?
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Old 01-20-2017, 01:14 PM   #8
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Two uses. Either running your batteries down at the end of a race day to storage levels. Sometimes the built-in discharging can take quite a while, especially if you are limited to around 30 watts of internal discharge capacity. The other thing people use high-amp discharging for is to quickly deplete a battery between races so they can then hit it with a lot of charging amps in an effort to heat the battery up and lower the internal resistance.

I use it as an occasional health monitor of my batteries. Charge them fully and run a high amp discharge program to check IR and voltage levels at 1 minute, 2 minutes, 4 minutes and 8 minutes.
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Old 01-20-2017, 01:20 PM   #9
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Ahh ok, thanks for the clarification. Do lipos run better when "hot"? To me that seems like a possibly dangerous and costly situation to put yourself in..
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Old 01-20-2017, 01:49 PM   #10
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I would call it warm, not hot. Yes, they typically drop IR (internal resistance) as they heat up which allows the voltage to hold up better over the course of a race. It's a "thing" in many stock/spec classes to give that little extra edge.

You will hear widely varying concerns for this activity from :"no big deal the batteries can handle it" to "you are going to blow yourself, the entire facility and all other participants up."
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Old 01-22-2017, 04:46 AM   #11
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LiPo explosions are scary and happen fast. If you are going to charge at higher amp rates always have them in a LiPo bag.
I highly recommend balance discharging for 2s or more. I believe that your batteries will run better longer if you do. I personally use a iCharger 4010 because of its ability to do that. It will discharge a 2s at 17a while balancing. Something like 140w/channel of discharge capability. Worth the money.
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