Overheating Battery
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Hi
I’ve just completed the restoration of my Elan Sprint. I installed a new RB340 voltage regulator which is charging the battery but I noticed that the battery gets very hot after a reasonably long run. Any ideas what might be causing this? Could the voltage regulator be putting out too much current? Any tips on how to resolve this.
Cheers
Matt
I’ve just completed the restoration of my Elan Sprint. I installed a new RB340 voltage regulator which is charging the battery but I noticed that the battery gets very hot after a reasonably long run. Any ideas what might be causing this? Could the voltage regulator be putting out too much current? Any tips on how to resolve this.
Cheers
Matt
- matt1954
- New-tral
- Posts: 6
- Joined: 16 May 2011
Hello,
I would consider that very seriously (an electrical fire is not something you want to experiment on a fiberglass car) to find out how the new regulator actually works I would monitor the charging voltage (which may depend on the battery condition, to be assessed when disconnected), and check if this voltage may be over the maximum tolerated by the battery (overcharging would make it generate heat). The charging voltage would depend on RPM so you may want to test it accordingly and not only at idle.
I would consider that very seriously (an electrical fire is not something you want to experiment on a fiberglass car) to find out how the new regulator actually works I would monitor the charging voltage (which may depend on the battery condition, to be assessed when disconnected), and check if this voltage may be over the maximum tolerated by the battery (overcharging would make it generate heat). The charging voltage would depend on RPM so you may want to test it accordingly and not only at idle.
S4SE 36/8198
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nmauduit - Coveted Fifth Gear
- Posts: 2076
- Joined: 02 Sep 2013
The battery shouldn't get hot. It is likely that the RB340 is incorrectly set or is faulty. Ideally, the battery should 'float' at around 13.6V to 14V when fully charged.
Lucas produced some excellent training pamphlets back in the day. This explains how to test and set a RB340 (section 4):
https://www.mgcc.co.uk/t-register/wp-content/uploads/sites/31/2021/07/Lucas_Generator_and_Control_Box_Tests.pdf
Lucas produced some excellent training pamphlets back in the day. This explains how to test and set a RB340 (section 4):
https://www.mgcc.co.uk/t-register/wp-content/uploads/sites/31/2021/07/Lucas_Generator_and_Control_Box_Tests.pdf
68 Elan S3 HSCC Roadsports spec
71 Elan Sprint (still being restored)
32 Standard 12
Various modern stuff
71 Elan Sprint (still being restored)
32 Standard 12
Various modern stuff
- Andy8421
- Coveted Fifth Gear
- Posts: 1252
- Joined: 27 Mar 2011
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