Patent ID: 6890681

Claim:
A leak resistant automotive battery comprising a housing containing cells each having a filling plug, a battery cover fitted to said housing at its opened top in a liquid tight manner and having filling holes overlying said cells, respectively and a pair of terminals mounted on the battery cover and connected to said cells; characterized by further comprising vent line blockage means to divide said battery cover into at least two vent chambers corresponding to two sets of said cells so that electrolyte is prevented from flowing from one of said sets of said cells to the other set of said cells when said battery is tilted; a common vent line provided in said battery cover to connect the spaces above said cells for each sets of said cells to each other for every set of said cells, and a parallel vent line provided in said battery cover for each of said sets of cells separately from said common vent line, one end of said common vent line being closed while the other end of said common vent line is connected through said corresponding vent chamber to one end of said parallel vent line and said parallel vent line at the other end having a vent cap assembly to permit escape of vented gas from said cells of each set.