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harold avatar image
harold asked

Relation / Action to Battery temperature

Technicians,
Yesterday my battery temperature rose above 30°C, I got a warning, , no alarm.
But in the charge characteristics I did not notice a reaction of the Quatro.
At what temperature a reaction will be noticeable?

Thanks, Harold
1626684059899.png

MultiPlus Quattro Inverter ChargertemperatureTemperature Alarmwarnings
1626684059899.png (40.0 KiB)
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4 Answers
Paul B avatar image
Paul B answered ·

Hi This is NOT a battery temp warning its a High Inverter Temp Warning, The red temp light would also flash on the Quattro at that time

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harold avatar image harold commented ·
Thnaks Paul!

But just curious, at what battery temperature would the charging change or stop?

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pwfarnell avatar image
pwfarnell answered ·

The battery charging voltage reduces slightly as the battery temperature increases. You can see that this is being done because after 20:00 hrs when the battery cools down, the charge voltage increases slightly. The same happened after 23:00 hrs when on float, the voltage kept increasing as the battery cooled down.

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Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

What battery do you have and what did you setup in VE.config?

Lithium batteries for example don't use temperature compensation.

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harold avatar image harold commented ·

1626700504351.png

My 24V system battery's are 2x VARTA 230Ah dual purpose lead acid

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1626700504351.png (20.4 KiB)
Mark avatar image
Mark answered ·

I don't know if it is properly documented anywhere, but the MultiPlus will not limit charging until battery temperature has reached 50°C, at which time the charge voltage set point will lower to 12/24/48V - see diagram below:

1849-temp-comp-chart-1.png


1849-temp-comp-chart-1.png (104.1 KiB)
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harold avatar image harold commented ·
Thanks Mark,

According to this graph, the temp sensor will eventually not protect for overheating etc (> 60 °C)

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Mark avatar image Mark ♦♦ harold commented ·

If the temperature was to read >60°C the temperature sensor is considered to be faulty - in response there will be a temperature sensor error and the setpoint voltage returns to the default charge voltage without any temperature compensation (to keep the system running in some capacity until the issue is fixed).

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harold avatar image harold Mark ♦♦ commented ·
Thanks!

So this set up will not protect from overheating due to malfunction of battery or charger. I will set my VRM battery temp alarm to 55°C or so to warn me!

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