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- Sparks During Correct Battery Connection: Plus-Then-Minus Clamp Order, Charging with Rectifier

podatek 25779 7
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  • #1 18487715
    podatek
    Level 5  
    Hello, is it normal that with the correct connection of the clamps to the battery after straightening, i.e. first plus then minus, there is sparking when the negative clamp contacts the battery? I do everything according to the recommendations and instructions, is this sparking somehow dangerous? The battery is charged with a rectifier with the garage windows open.
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  • #2 18487729
    F50
    Level 17  
    Hello
    This is a natural phenomenon when connecting the battery to the charger, if it is connected to the mains. For safety, it is best to connect the clamps to the battery with the charger turned off.

    Regards
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  • #3 18488777
    kierbedz4
    Level 36  
    The instruction manual bows. Always connect the rectifier clamps when the rectifier is disconnected from the mains. Also when the rectifier is disconnected from the mains, the rectifier terminals are disconnected from the battery. In the case of removing the rectifier clamps from the battery shafts with the rectifier switched on, a spark flash occurs between the battery shaft and the rectifier terminal, which may cause an explosion, which may lead to tearing the battery walls.
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  • #4 18488843
    ladamaniac
    Level 40  
    Hydrogen is released, hydrogen sulfide only when you confuse a passenger car with a truck (i.e. you give too high charging voltage, e.g. 24v for a 12 volt battery. Nevertheless, hydrogen is even more explosive than hydrogen sulfide.
    Sparking when installing the clamp is the result of charging capacitors in various controllers.
  • #5 18489205
    podatek
    Level 5  
    of course, I connect it with the rectifier disconnected, as if I would connect the battery to the car circuit with the rectifier turned on to the battery and why. Same when I plug it in to charge.
  • #6 18489247
    krzysiek_krm
    Level 40  
    podatek wrote:
    Hello, is it normal that with the correct connection of the clamps to the battery after straightening, i.e. first plus then minus, there is sparking when the negative clamp contacts the battery? I do everything according to the recommendations and instructions, is this sparking somehow dangerous? The battery is charged with a rectifier with the garage windows open.

    The phenomenon is completely normal. Modern cars are packed with electronics, some capacitors in the power circuits charge up when plugged in, etc, etc, a little sparking is normal.
    I assume it's not an arc like in a welding machine.
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  • #7 18491166
    podatek
    Level 5  
    exactly, slight sparking on the inside of the quick coupler and the minus pin
  • #8 18491311
    FAB 2002
    Level 20  
    If a multimeter is available, it is worth measuring the leakage current in the installation.
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Topic summary

Sparking during the connection of battery clamps is a common occurrence, particularly when the battery is connected to a charger. It is advised to connect the clamps with the charger turned off to minimize risks. The sparking can result from the charging of capacitors in electronic circuits, especially in modern vehicles. While slight sparking is normal, it is crucial to ensure that the rectifier is disconnected from the mains before connecting or disconnecting the clamps to prevent potential hazards, such as battery explosions due to hydrogen gas release. Monitoring leakage current with a multimeter is also recommended for safety.
Summary generated by the language model.
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