Tesla front sdu max battery voltage!?

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thetdiguy
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Tesla front sdu max battery voltage!?

Post by thetdiguy »

As the title states i was wondering how much voltage one would take reliably i have 12 A123 lifepo4 40v 12s modules i was planning 10 in series but at max charge voltage it would be 432v versus 388v for 9 packs would is take the 432 on the higher end ?
thetdiguy
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Re: Tesla front sdu max battery voltage!?

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Re: Tesla front sdu max battery voltage!?

Post by EV_Builder »

It's about the margin in regards to the fets in the inverter. If I'm correct they are 600Volts. So I think you can do that but I would monitor the battery voltage closely and ramp Regen accordingly with battery SoC etc.
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thetdiguy
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Re: Tesla front sdu max battery voltage!?

Post by thetdiguy »

I guess is it worth taking the risk for the extra .75 kwh module
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Re: Tesla front sdu max battery voltage!?

Post by EV_Builder »

actually the issue is the bus capacitor that one is spec'd lower. In another thread this question came along too.
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Re: Tesla front sdu max battery voltage!?

Post by remy_martian »

The Model 3 caps are rated at 430VDC. Not sure what SDU is.

I would not go with 10 modules unless someone (you have the unit - have a look) can confirm the caps are rated to 500VDC.
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Re: Tesla front sdu max battery voltage!?

Post by Bratitude »

You don’t have to charge the pack up to pack voltage…
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Re: Tesla front sdu max battery voltage!?

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Converting an Porsche Panamera
see http://www.wdrautomatisering.nl for bespoke BMS modules.
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