<span class="highlight">battery</span> charging <span class="highlight">temperature</span>
Submitted: Saturday, Oct 25, 2008 at 18:38
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oz doc
Hi all. Just wondering how many of you use a
battery charger which monitors
battery temperature? Living in a fairly hot climate, I'm told by the 'locals' that batteries don't last as long up here. I was doing some reading and saw that some
battery chargers can monitor
battery temperature and cut out if things get too hot. I was wondering if this would be useful up here. Or would I just get a continual interruption to the charging process because of going frequently? Thoughts everyone. ta. doc.
Reply By: Member - Kiwi Kia - Sunday, Oct 26, 2008 at 08:21
Sunday, Oct 26, 2008 at 08:21
Dissipation of heat during charging can be a problem. However, modern construction methods have alleviated most of the problems associated with the warping of plates due to
temperature. Also, consider just how high the
temperature can get under the bonnet on a vehicle. The
battery mount is usually rather close to a very hot engine but we accept that as being normal. I often wonder just how a charger can accurately measure the
temperature inside a
battery with out any physical contact with the
battery core. A charging current calculation does not take into account the robustness or thickness of the plates and separators, number of plates or physical size of the
battery or the ability to dissipate excess heat.
AnswerID:
331929
Reply By: Member - Norm C (QLD) - Sunday, Oct 26, 2008 at 08:34
Sunday, Oct 26, 2008 at 08:34
My C-Tec charger monitors temp. But I'm pretty sure it is ambient temp, not
battery temp it is monitoring. Have no idea how it could monitor
battery temp.
The charger adjusts charge voltage depending on the temp it measures. Instructions say that if for some reason it cannot detect the temp, it will default to an assumption of 25 degrees C.
These are excellent chargers, but they are expensive.
Norm C
AnswerID:
331932
Follow Up By: Dunaruna - Sunday, Oct 26, 2008 at 08:51
Sunday, Oct 26, 2008 at 08:51
The temp sensor is supposed to be taped to the side of the
battery so as to measure
battery case temp.
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599774
Follow Up By: Member - Norm C (QLD) - Sunday, Oct 26, 2008 at 10:03
Sunday, Oct 26, 2008 at 10:03
The user manual says to 'ensure the temp sensor is as close as possible to the
battery'. This is pretty much a given due to its location (close to the
battery clamps).
If taping to the
battery was necessary for the sensor to work, I'd have thought it would be part of the instructions. Not a bad idea though, all the same. Certainly get it 'as close as possible'.
On my last trip I noticed that the temp compensation light on my charger is on, which indicates the sensor (or compensation) is not working. Guess I'll have to get it checked out. In the meantime, the charger works, just does not compensate for
temperature. It defaults to 25 C.
Norm C
FollowupID:
599789
Reply By: ajr - Monday, Oct 27, 2008 at 13:15
Monday, Oct 27, 2008 at 13:15
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