Boiling Battery

[Dangermouse]

Hi Everybody im back in the fold after about two years going AWOL still have the campervan and still have all the niggly (sorry quirky) T25 problems.
The latest being whilst travelling round France last summer i kept getting a horrible smell like rotten eggs at first i thought it was just a bit of French cheese that had been dropped somewhere but on closer examination it was the liesure battery boiling up. This was just happening on one cell I think so my question is (at last) will it just be the battery that is knackered or is ther something wrong with the split relay?

Many thanks

[kevtherev]

hello and welcome, didn't know you were away!
as it's your first post and all

[Dangermouse]

When i was first on the forum i think i only posted two bits of T25 ignorance, now a few years on i know even less

[kevtherev]

As your problem is generic to all batteries I googled it and came up with ..

Overfilling or overcharging

over charging would start with a defective cell
A cell shorts in the battery causing a drop in voltage. The charger (alternator) senses the drop in voltage and begins bulk charging. The bulk charging causes the battery to heat up (as does the shorted cell). As the battery heats, the voltage continues to drop causing the charger to increase charging current... which causes more heat, more heat causes the voltage to drop more, and so on.

meltdown!

so in a nutshell your battery is shagged

[Dangermouse]

Thank you very much for that info i can change a battery easy enough. Just looked up in the members list i joined originally in june 2006 mem no 3100 but i cant remember any passwords i would of used so i have rejoined.

[kevtherev]

Thank you very much for that info .

your welcome

[Red Westie]

Boiling battery....happened to me 2 years ago on a day trip to Rutland Water, the leisure battery got so hot that I could barely touch it!
One cell had internally shorted and had melted the split charge relay together at the same time.
New relay and battery fixed it.
Martin