Max Discharge Current Explanation Needed

[Callbrin]

How do you know what kind of battery to get i.e. Discharge Current Rating. How would I know what rating I needed so I dont end up overheating and/or killing the batteries?

Thanks in Advance

 

[ScooterMan101]

What motor do you have ?

What is the max amp rating and top voltage rating of the controller ?

Do you live in a flat area of the world or are you going up hills ?
if
Going up hills how steep are they ? how long are those hills 1km, 2km or longer etc ?
What do you weigh ? and are you carrying cargo ?

How do you know what kind of battery to get i.e. Discharge Current Rating. How would I know what rating I needed so I dont end up overheating and/or killing the batteries?

Thanks in Advance

 

[SirLongAss]

There are usually two ratings when it comes to Discharge Current.

Constant discharge current: The amount of amps you can pull from the battery for any amount of time with no chance of damage.

Max/Peak discharge current: The max amount of amps that can be pulled from the battery without doing instant damage to it. I recommend not holding that amount for very long as it can overheat your battery and cause damage.

My battery's constant discharge current is 80 amps and 150 amp peak. I do short pulls of 150 amps but then again I installed a temp sensor in my battery to make sure it doesn't burn up.

If it can be done, buy a battery with a constant discharge current higher then what your ebike can is rated for.

 

[MadRhino]

Cell specs are not always true numbers. Test bench and real life are sometimes very different. So, I test them in real usage. I buy them way above my needs when I can. High C rate RC lipo cells can deliver amazing bursts of power, but their real life c rate must be cut by half after they are assembled and enclosed.

It is easy to know when your battery is within its comfort zone. If it is happy, it stays balanced and cool. If it does get warm, you are close to its limits. If it does smell, you are very close to kill it.

 

[Callbrin]

If it can be done, buy a battery with a constant discharge current higher then what your ebike can is rated for.

Where do i find that rating? the motor controller? or is it based on the wattage?

 

[MadRhino]

The controller is set to limit Amps. Some controllers are programmable, so this value can be changed.

Batteries have 3 C rate specs: Charging C rate, constant discharge C rate, peak discharge C rate.

 

[e-beach]

If it can be done, buy a battery with a constant discharge current higher then what your ebike can is rated for.

Where do i find that rating? the motor controller? or is it based on the wattage?

If you are building your own battery, use the manufactures specs for charging and discharging.

If you are purchasing a already built battery pack, confer with the manufacture about the specs of the pack.

If no specs are given by the manufacture, don't purchase the batters or pack.

 

[Callbrin]

If it can be done, buy a battery with a constant discharge current higher then what your ebike can is rated for.

Where do i find that rating? the motor controller? or is it based on the wattage?

If you are building your own battery, use the manufactures specs for charging and discharging.

If you are purchasing a already built battery pack, confer with the manufacture about the specs of the pack.

If no specs are given by the manufacture, don't purchase the batters or pack.

Sorry I meant how do I find how much my ebike would draw from a battery pack so i dont get one too underpowered

 

[SirLongAss]

If it can be done, buy a battery with a constant discharge current higher then what your ebike can is rated for.

Where do i find that rating? the motor controller? or is it based on the wattage?

If you are building your own battery, use the manufactures specs for charging and discharging.

If you are purchasing a already built battery pack, confer with the manufacture about the specs of the pack.

If no specs are given by the manufacture, don't purchase the batters or pack.

Sorry I meant how do I find how much my ebike would draw from a battery pack so i dont get one too underpowered

It should say how many amps on your controller but incase it doesn't (or you have one of those integrated controllers) Just look at the manufacturer's specs.

If you can't figure it out, post pictures and I'm sure I or someone else can help.

 

[e-beach]

Or get a cycle analyst from ebikes.ca or if that is out of the budget, get a rc watt meter from ebay and us it to find your max amp draw.

 

[Hillhater]

Or get a cycle analyst from ebikes.ca or if that is out of the budget, get a rc watt meter from ebay and us it to find your max amp draw.

Errr ??... That assumes he already has the battery, and that the battery is able to output more amps than the system requirements !

 

[e-beach]

....
Errr ??... .....

Got a bit ahead of it this time didn't I.....

:lol: