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Discussion Starter #1
Hello....

We need a company or somebody to supply or assembly a complete battery system for us.

Our need is for a 77 Kw pack system. 750v with constant discharge capacity of 300Ah and peaks of 650.

We have tried contacting the following without success: A123, Enerdel, LG Chem.

Any suggestions?

Thanks
 

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Hello....

We need a company or somebody to supply or assembly a complete battery system for us.

Our need is for a 77 Kw pack system. 750v with constant discharge capacity of 300Ah and peaks of 650.

We have tried contacting the following without success: A123, Enerdel, LG Chem.

Any suggestions?

Thanks
What is your budget?

Edit: also, what are your size and weight constraints?

Edit 2: Tell me more about this 750V. Is that fully charged or nominal?
 

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Hello....

We need a company or somebody to supply or assembly a complete battery system for us.

Our need is for a 77 Kw pack system. 750v with constant discharge capacity of 300Ah and peaks of 650.

We have tried contacting the following without success: A123, Enerdel, LG Chem.

Any suggestions?

Thanks
Do you mean a 77kWh pack? with a constant 300A discharge and 650A peak?

Units are important here.

77kW isn't that hard, that's only about 144V and 500A peak.... but you said 300A and 750VDC, which (with some sag) is ~210kW constant and ~440kW peak.

Won't be cheap, nor small, nor off-the-shelf.
 

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Discussion Starter #6
Hello...

I will try to answer all questions here.

- Space/size/weight is not a problem..
- Due to Kw/Km we determine that 78 Kw battery pack should be enough.
- The motor we will use needs 300-750V operating voltage. Max. current 615Adc, continuous of 350 Adc both @500Vdc. We don´t expect to be using all the power, but we want the battery to be able to provide it just in case. We thought a 100AH battery with 3C constant and 10C pulse battery should be fine.
- Expected cycles would depend on battery manufacturer and SOC. We would like to get around 5,000.
- We guess it will need active cooling.

Application
- We need it for a Bus, with this you can assume it will do constant starts and stops. From 0 to 60km/h will take around 22 sec., then cruising speed for 20sec. aprox. then stopping and waiting minimum for 12 sec. while loading and unloading passengers and start again. That would be constant for 1 hour at least. Then we expect the battery to be gone.

- we are intentionally looking for the smallest battery we can put together to reduce cost to the max. It doesn't matter if we have to charge it every hour or so, that is part of the plan. We don't want a 300Kw battery that will cost hundreds of thousands of dollars that will last all day and take all night
to charge. We don´t now yet if we will stop the unit for fast charging or if we will replace the pack to aloud the unit to keep running and provide 0.5C charge to extend battery life.


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I didn't see any budget numbers. If you are expecting something like $25,000 then your best bet is probably to buy 220 CALB 100s and test your theory that size and weight don't matter.

If you have a bit bigger budget, there are some good solutions available.
 

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Discussion Starter #9
I didn't see any budget numbers. If you are expecting something like $25,000 then your best bet is probably to buy 220 CALB 100s and test your theory that size and weight don't matter.

If you have a bit bigger budget, there are some good solutions available.

A $30K to 40K dlls budget would be ok.

Yes, we where looking at Winston and Calb, the issue is not the cells, but to put all the system together.

What I mean size and weight is not a problem is that in the range of 500kg to 800 kg for the pack is ok for us and the vehicle. About space, we have plenty too. I calculated 220 cells won´t be more than 1.5m x 1.5m. We have more than that.

What good solutions you mean?
 
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