Easy to calculate
V=IR or I=V/R
R should be very small in the case of connecting with wires or contactors etc.
So if the delta voltage is 2 volts and R=0.1 ohms I=20amps.
Easy to see that currents can get very high quickly as the delta V between
batteries grows.
A variable resistor could be inserted to control the current.
In the case of my care fully charge is 149.6 volts fully empty can be as low as
110 volts.
delta V = 39.6 volts if R=0.1 ohms then I =396 amps a 500 ohm resistor drops
that to 80mA.
From: Bill Collins via EV <[email protected]>
To: [email protected]; [email protected]
Sent: Tuesday, June 7, 2016 7:20 AM
Subject: Re: [EVDL] Current limiting
The resting voltage of a lead acid battery is significantly lower than the
voltage required to charge it. For example: a fully charged 12 volt battery has
a resting voltage of 12.6, but will not draw much current unless you apply 13.5
volts or so. This means that when you connect two batteries with different
states of charge, less current flows than many people think.
Bill
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