[z.gagnon]

I am looking at building a HV EV and am looking at SoC meters that go through a shunt (see pic). Most of the ones I find are designed for a maximum of 80 V. My battery have an output of 288 V and I was wondering if a shunt lowered the Voltage so that an SoC of 80 V would work. If they don't work, do you guys know of any HV SoCs?

 

[remy_martian]

A shunt is merely a low value resistor that measures current by turning it into a voltage referenced to the reference potential of the HV battery (aka negative terminal).

 

[NikMish]

That PS1 box next to the state of charge meeter will lower the voltage 5:1 or 10:1. The SoC has option in it to specify which voltage divider you're using.

 

[z.gagnon]

Thank you for your replies!

 

[z.gagnon]

That PS1 box next to the state of charge meeter will lower the voltage 5:1 or 10:1. The SoC has option in it to specify which voltage divider you're using.

Do you know the technical designation of this PS1 box? I am having a hard time finding it online

 

[NikMish]

Do you know the technical designation of this PS1 box? I am having a hard time finding it online

Sorry, just found your post.

here is 5:1 :

TBS 5:1 Pre-scaler, EV West - Electric Vehicle Parts, Components, EVSE Charging Stations, Electric Car Conversion Kits

 

[NikMish]

here is 10:1

TBS 1:10 Voltage Prescaler

The Expert Pro 1:10 Passive voltage prescaler extends the voltage sense input range of the Expert Pro from 0-35VDC to 0-350VDC. Being a passive prescaler, these units are not equipped with an internal DC-DC converter. This means that instead of powering the battery monitor itself from HV battery...

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