Battery Temperature Sensors

[luvrbus]

Another ? for the electrical gifted as some know my batteries went south how does the battery temperature sensor work the batteries have the sensors should they have not prevented the batteries from having a thermal runaway as was told to me.

Aren't the sensors supposed to regulate the charging rate through the inverter if the batteries are too getting hot, I am just trying to figure out why this happen so it doesn't happen again       thanks   

[sledhead]

I changed from a xantrex inverter to a magnum inverter and tried to use the temperature censer from the xantrex that was on the - battery post ... didn't work ... had to install the magnum censer .

works great now

dave     

[Darkspeed]

Yes the temp sensor should switch the inverter into low charge rate or off on a high temperature signal.

1. This depends on the temp sensor working properly
2. The software revision in the inverter
3. some depend on the wire type. Some temp sensors have a calibrated wire resistance and extending them with the incorrect type of wire will cause them to not function properly.

Sometimes a battery will drop a plate ( due to age or abuse ) and internally short causing what looks like a high temp / overcharge condition.

Had you recently changed your charge rate?

Sorry to hear you lost your batteries!

Was the melt down in all of the batteries? or just one?

[luvrbus]

They got so hot it melted the 6 case together 2 are really bad,the tech told me when one has a thermal melt down it takes all of the batteries with it.

I am just looking for a reason it happen the reps are pretty tight lipped about the deal they don't volunteer any info it's sorta like getting a kid to admit a lie lol  

I know not 1 of the 6 will take a charge now.I even went and bought me a high 80 amp mechanical charger thinking it was just my smart chargers still no joy for 190 bucks  ,when 1st happen they said they would replace the batteries  

Now they are back peddling and just want to pay part of it because they were not in a well vented area with no space around the batteries according to their Rev D issued 4/14/14 which I knew nothing about.
The battery monitor (new) works it shows the charge rate,volts,temperature and amps but I am not in the bus 24hrs either but it has never shown over charging or high temps when I looked at it          

[Darkspeed]

bummer..

what charger?
what temp sensor?
were the temp sensor wires extended?
was the charge rate compatible with the AH of the battery bank?

anything weird like blown diodes in the alternator/generator possibly feeding ac to the charger rather than dc?

because they were not in a well vented

= BS , that is part of what the temp sensor is for..

if the sensor is 0-10v then is could be corrosion in the pins, if it is 4/20ma then it could be the load resistor failed.

[luvrbus]

I think it was a battery problem and they have had happen before or the revision D would never came out.It is nice install no mickey mouse install. 

John and Steve went to great expensive on the cables and wiring no splices any where.I have stacked (2) 4000w pure sine wave Xantrex with chargers they work good you can see the bulk and float charge at all times.I just don't want it to happen again so am going by the book     

[Tony LEE]

What have you got in the bus that needs 8000W of inverters?

[luvrbus]

5 roof airs for 1 thing but I am changing to just 1- 4000w,8000w is common on the factory Prevost conversions which mine is not   

[Darkspeed]

I think it was a battery problem and they have had happen before or the revision D would never came out.It is nice install no mickey mouse install.  

John and Steve went to great expensive on the cables and wiring no splices any where.I have stacked (2) 4000w pure sine wave Xantrex with chargers they work good you can see the bulk and float charge at all times.I just don't want it to happen again so am going by the book    

Just a guess, possibly a too progressive charge rate and a too lenient high temp alarm set point lead to battery overheating and plate erosion causing one of the batteries to eventually internally short and wiping out the string of batteries. = software error

[luvrbus]

Nope the tech check all the setting

[Darkspeed]

You may want to add something like this to measure compartment temp and send a shut down signal > http://www.grainger.com/product/JOHNSON-CONTROLS-Line-Volt-Mechanical-Tstat-38Y057?s_pp=false&picUrl=//static.grainger.com/rp/s/is/image/Grainger/38Y048_AS01?

[Darkspeed]

Nope the tech check all the setting

If all of the settings are correct what did the software revision fix??

[luvrbus]

It's not a software revision the D revision is a installation revision from LifeLine   

[Darkspeed]

It's not a software revision the D revision is a installation revision from LifeLine   

O... sorry i missed that

[luvrbus]

If people read the revision it will change the outlook on where to mount a LifeLine AGM it has me