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Thread: acid bass?

  1. #11
    Maximum Bitrate Crinos's Avatar
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    Quote Originally Posted by vull View Post
    didnt think that i would need such a 'hook'
    battery is RayLit 72Ah, 680A (somekind of Diesel Booster)

    i've had to charge it couple of times before due to some lights left on in the car and the levels have never been high imo. how much is too much anyway? i think i would have spotted it
    If you have a BMW diesel, your supposed to have a 85Ah battery. At least that's what is say in my E46 320DAT

  2. #12
    Raw Wave
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    Is that a wet battery in an enclosed area????


    PS - I hadn't viewed previously 'cos I thought is was a house question - ie audio.
    Water indeed.

  3. #13
    Constant Bitrate vull's Avatar
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    maybe you could talk english instead os smailish?
    i do have closed the side venting holes

  4. #14
    Constant Bitrate Sleepyz0mby's Avatar
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    ohhhhh ya thats a good point. when an electrical current is passed through water (charging), hydrogen is made (browns gas). one small oldSpark = kaboom

    gooood point oldspark. see i knew he would show up, and always with a point to make

    as for the venting holes - wouldn't the pressure from the fumes pop the fill caps off? AND there is usually a battery temp sensor under the hood nowadays that throttles the charge going to the batt, and i guess thats why.

  5. #15
    Raw Wave
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    Which part do you want explained?

    A flooded battery in a confined space?
    The legalities of the above?
    The battery condition after flattening by "lights left on"?
    The battery condition after "the PC drained all the power"?
    The battery condition if it was sitting "drained" for a week or several?
    That a battery doesn't "create water"?

    The bottom line is that the battery has been penetrated by a Y-chromosomal flagellum; it is fundumentally fertilised; or farked; or stuffed. (Pick your preference.)

    Assuming it's your only battery, acid will be bubbling out during cranking and heavy loads, and probably during charging.
    Put it back in the engine bay where it belongs. Get a new cranker if needed.
    If you want a boot battery for independent reserve or low resistance for the amp/s, get an AGM battery. If just independence etc, then an enclosed vented battery.


    The only way this story could serve better as an example of what NOT to do ('cos of what can happen) is if it involved two batteries in parallel...
    The only thing that could be worse is a thermal runaway of an AGM battery (maybe in parallel), though - like this situation - you are probably lucky there hasn't been an explosion. Yet.
    Hopefully your lungs haven't been damaged.


    And apologies if I seem a bit cruel. Like your battery, I'm just venting.


    PS - UNBLOCK those vents!!!! You'll either have Hindenburg-II or be extracting acid from hole area (hole is not mispelt!).

  6. #16
    Raw Wave
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    Quote Originally Posted by Sleepyz0mby View Post
    hydrogen is made (browns gas). one small oldSpark...
    ... a battery temp sensor under the hood nowadays that throttles the charge going to the batt....
    Hydrogen is always produced within a battery (a side effect of electrolysis), problem is that above 2.4V/cell, there is a lot of hydrolysis...

    But I'll bet bubbling is pushing out the acid.
    Bubbling occurs during overcharging and over-loading. (Remove a cap and see if any bubbles appear during normal cranking. Most batteries will to a small extent. So do AGMs (albeit bubbles in gas LOL).)

    Battery temp sensors should be on the battery - not "under the hood".

    And I thought this battery was in the boot/trunk - it looks it to me.
    That's why vented batteries are banned in enclosed areas like boots unless contained within a sealed non-metal externally vented enclosure.
    Not that this has yet reached the stage of why it is banned, but any day now.... No damage has yet occurred (in a regulatory sense).

    Browns gas is just a fancy name for electrolysed water ie O2 & 2H2.

  7. #17
    Constant Bitrate Sleepyz0mby's Avatar
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    Quote Originally Posted by OldSpark View Post
    Battery temp sensors should be on the battery - not "under the hood".

    Browns gas is just a fancy name for electrolysed water ie O2 & 2H2.
    fancy smancy! electrolysed water ie O2 & 2H2

    "under the hood" was ment to distinguish from the two batteries in the truck and engine compartment

    geez your such a grumpy aussie

  8. #18
    Raw Wave
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    LOL! Don't forget - Brown was an Ozzie - and he's conned the rest of the world....


    Re "under the hood" - it doesn't matter - the temp sensor needs to be in the battery.
    And if there are 2 batteries, the alternator needs to limit to the lower temperature of the batteries (which in cold climates is usually the trunk battery which may suffer a voltage drop anyhow if highly loaded...).

    But charging systems usualy aren't that fussy anyhow....
    If they were, they would all have "S" type alternators (ie, at least 2 wires) PLUS a remote temp sensor for the (or each) battery...
    Nah - just use a single wire D+ type - that might "undercharge" but should never overcharge.... except when hot...

  9. #19
    Constant Bitrate vull's Avatar
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    just to be clear - i have closed the side vents on the 2 sides of the boot, not battery.

    but would it help if i run a hose from the battery vent hole to the bottom of the boot/through the 'floor'? i saw a rubber seal in there, which looks like this from the outside -> |'''| (like has 2 longer sides, facing the front of the car and the back). thats not enough ventilation?

  10. #20
    Constant Bitrate vull's Avatar
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    BUT! i just realised... i dont have anything on the rear window sill, so that should clearly provide some ventilation, especially if there's the ridiculous bass moving the air?

    so the fumes dont smell either, it just helps to kill metal and your lungs?:d
    perhaps the blue rug blocked the vent then? would that even result in this?
    p.s. i've driven around for 2 days now and have had nothing like this anymore. what would even overcharge it? the car itself?
    about cranking... i've done that recently too - even with the pc and screen on

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