Car power source apparatus

A car power source apparatus comprising:

• a plurality of battery cells;
• each of battery cells having
• a case and
• a current interrupt device housed therein, the current interrupt device deforming to separate a connection point and cut-off current when the battery cell internal pressure exceeds a set pressure;
• and
• a high voltage battery having the plurality of battery cells connected in series or parallel, each battery cell having the current interrupt device connected to an electrode terminal,
• wherein
• the case has a rectangular outline with a pair of opposing planar surfaces, an electrode unit, which is a stack of positive and negative electrode plates with intervening separators, and the current interrupt device are disposed between the pair of opposing planar surfaces,
• the plurality of battery cells is stacked with opposing planar surfaces opposite each other to form a battery block, a pair of endplates is disposed at the ends of the battery block, the pair of endplates is connected by connecting components, and the pair of endplates holds the battery cells in the stacked configuration applying pressure in a direction perpendicular to the opposing planar surfaces.