hi amp battery

1344 Views 6 Replies 4 Participants Last post by brian_, Mar 24, 2018

techno

Discussion Starter · Mar 21, 2018

Hello! I need a 100V battery to power a 50kV motor with 300-400A currents. Which elements are better to use? I'm looking at an assembly of 32s2p LIFEPO4 HEADWAY 40152S 15ah or a 10ah SCIB Toshiba Li-ion LTO. I do not need capacitance as maximum currents, which can give out the battery in 8-10 seconds.

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Kevin Sharpe

· #2 · Mar 21, 2018

techno said:
I need a 100V battery to power a 50kV motor with 300-400A currents.

400A x 100V = 40kW not 50kW (assuming 50kV was a typo)

Can you tell us more about the motor and the application? If this is a vehicle you don't need a sustained 50kW.

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techno

Discussion Starter · #3 · Mar 21, 2018

Kevin Sharpe said:
400A x 100V = 40kW not 50kW (assuming 50kV was a typo)

Can you tell us more about the motor and the application? If this is a vehicle you don't need a sustained 50kW.

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Yes, My English is not very good.

I have a motor me1616, I will run it together in the engine of internal combustion (belt transmission to the crankshaft). The time of its operation will be 6-8 seconds with pauses for braking and unloading. I want to run it at 96V and the only thing that will stop me is a suitable battery capable of giving off large currents for a short time.

I do not care about the capacity, but you need to get a minimum of 30kw from the engine, which is 300a load on the battery. I want to start with this, and subsequently increase the battery, if the option for 300-400a will show its performance.

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brian_

· #4 · Mar 22, 2018

techno said:
I need a 100V battery
...
with 300-400A currents.

...

I'm looking at an assembly of 32s2p LIFEPO4 HEADWAY 40152S 15ah or a 10ah SCIB Toshiba Li-ion LTO.

300 amps over 2 cells in parallel is 150 amps, or a discharge rate of 10C for 15 Ah cells, or 15C for 10 Ah cells. I'm no expert on the current capacity of these (or any other) cells, but it sounds aggressive to me.

techno said:
Which elements are better to use?

I assume that this was just an awkward translation, and was intended to be "which cells".

techno said:
... give out the battery in 8-10 seconds.

I assume that you intended to say that this high current would only be needed for 8 to 10 seconds (which makes sense), not that the battery would be fully discharged in that time (which would be unreasonable).

Overall, this is a parallel hybrid application, so cells intended for hybrid service (high power density, but not necessarily high energy density) would be suitable. Have you considered part of a production hybrid vehicle battery?

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techno

Discussion Starter · #5 · Mar 22, 2018

brian_ said:
300 amps over 2 cells in parallel is 150 amps, or a discharge rate of 10C for 15 Ah cells, or 15C for 10 Ah cells. I'm no expert on the current capacity of these (or any other) cells, but it sounds aggressive to me.

I assume that this was just an awkward translation, and was intended to be "which cells".

I assume that you intended to say that this high current would only be needed for 8 to 10 seconds (which makes sense), not that the battery would be fully discharged in that time (which would be unreasonable).

Overall, this is a parallel hybrid application, so cells intended for hybrid service (high power density, but not necessarily high energy density) would be suitable. Have you considered part of a production hybrid vehicle battery?

yes, current would only be needed for 8 to 10 seconds 300Аmp

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GreenTecAuto

· #6 · Mar 24, 2018

Hey, I might be able to help.
Your best bet might be Gen 1 Chevy Volt batteries.
They can handle 350A peak, and 2 48V modules fully charged would get you to 100.8V. Would be relatively cheap and easy.

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brian_

· #7 · Mar 24, 2018 (Edited)

GreenTecAuto said:
Your best bet might be Gen 1 Chevy Volt batteries.
They can handle 350A peak, and 2 48V modules fully charged would get you to 100.8V. Would be relatively cheap and easy.

Well, two of the 12s3p modules would be 90 volts nominal... maybe that's close enough.

I don't know how available they are, but one 12s2p module plus one 16s2p module from the second generation Volt would be 105 volts (nominal)... and presumably 117.6 V at full charge (charged to 4.2 V/cell).

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