Gases Emitted During Charging of Battery

Discussion in 'General Electronics Chat' started by Landon, May 18, 2010.

  1. Landon

    Thread Starter New Member

    Oct 3, 2007
    Hi all,

    I understand that whenever we charge a battery, hydrogen emission would occur. Are there any gases emitted apart from hydrogen? What is the acceptable level of hydrogen emission? How do I calculate the level/amount of hydrogen gas emitted? I need some guidance on this and would appreciate the assistance from fellow forumers.

    With gratitude,
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    YOu get oxygen liberated with the hydrogen. Since the plates are close together, the gasses mix in an explosive ratio. It is important to limit charging voltage to minimize electrolysis during the charging.

    Here is a link to the Battery University article on charging lead-acid batteries -