Power source apparatus having bus-bars

Abstract

The power source apparatus is provided with batteries having positive and negative electrode regions, parallel blocks with batteries stacked together and electrically connected in parallel, multiple parallel-series connected blocks with the parallel blocks electrically connected in series, and bus-bars having a plurality of insertion holes to insert the positive and negative electrode regions and electrically connect the batteries. Batteries in a parallel block are stacked together lining-up positive electrode regions on one side and negative electrode regions on the other side. Parallel blocks in a multiple parallel-series connected block are stacked reversing the orientation of each block added to the stack. The bus-bars are integrated pieces that can electrically connect the batteries in a parallel block in parallel as well as electrically connect the parallel blocks in series.

1 . A power source apparatus comprising:
 batteries having positive and negative electrode regions;   parallel blocks with the batteries stacked together and electrically connected in parallel;   multiple parallel-series connected blocks with the parallel blocks electrically connected in series; and   bus-bars having a plurality of insertion holes to insert the positive and negative electrode regions and electrically connect the batteries,   wherein batteries in a parallel block are stacked together lining-up positive electrode regions on one side and negative electrode regions on the other side of the parallel block,   parallel blocks in a multiple parallel-series connected block are stacked reversing the orientation of each parallel block added to the stack, and   the bus-bars are integrated pieces that electrically connect the batteries in a parallel block in parallel as well as electrically connect the parallel blocks in series.   
     
     
         2 . The power source apparatus as cited in  claim 1  wherein the size of the insertion holes in a bus-bar with a plurality of insertion holes increases gradually in the battery stacking direction. 
     
     
         3 . The power source apparatus as cited in  claim 2  wherein the insertion hole at one end of a bus-bar is the smallest and insertion hole size increases gradually towards the other end of the bus-bar. 
     
     
         4 . The power source apparatus as cited in  claim 2  wherein the insertion hole at the center part of a bus-bar is the smallest and insertion hole size increases gradually towards both ends of the bus-bar. 
     
     
         5 . The power source apparatus as cited in  claim 2  provided both with bus-bars having the smallest insertion hole at one end with insertion hole size increasing gradually towards the other end, and with bus-bars having the smallest insertion hole at the center part with insertion hole size increasing gradually towards both ends. 
     
     
         6 . The power source apparatus as cited in  claim 1  wherein the high-current section of a bus-bar is made thicker than other parts of the bus-bar. 
     
     
         7 . The power source apparatus as cited in  claim 1  wherein the high-current section of a bus-bar is made with more surface area than other parts of the bus-bar. 
     
     
         8 . The power source apparatus as cited in  claim 1  wherein a bus-bar is made entirely of a single material. 
     
     
         9 . The power source apparatus as cited in  claim 1  wherein a bus-bar is formed as a single integrated piece using clad-material made of dissimilar materials. 
     
     
         10 . The power source apparatus as cited in  claim 2  wherein a detection line to detect the battery state is connected at the smallest insertion hole in a bus-bar. 
     
     
         11 . The power source apparatus as cited in  claim 2  wherein insertion hole size for a bus-bar with a plurality of insertion holes increases by 0.1 mm for each hole.